Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers



List of Laser Pointer Companies by Category



Welcome to Laser Pointer Forums! A common question is where to buy laser pointers. If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.






Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > 445nm Lasers



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 01-13-2017, 07:21 AM #1
Accutronitis's Avatar
Class 3R Laser
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Accutronitis Accutronitis is online now
Class 3R Laser
Accutronitis's Avatar
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Default Why are blue lasers much higher output than green lasers ?

Why are blue lasers much higher output than green lasers ?

Green seem to have max output of around 1 watt while blue seems to be max output of around 7 watts ?


__________________
The Accutron Resource Forum your source for the best & most up to date Accuton 214 info On The Web Please Visit http://accutronfacts.freeforums.net/

---------------------------------------------------------------------------------------------------------------------------------------
My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - JL 10X Beam Expander Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - "Alien Laser" Donated NUBM44 6.8 Watts at 4.5 Amps 450nm Diode In A DTR 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb
Accutronitis is online now   Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 01-13-2017, 09:30 AM #2
HydroSean's Avatar
Class 2M Laser
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
HydroSean HydroSean is offline
Class 2M Laser
HydroSean's Avatar
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

HydroSean is offline   Reply With Quote
Old 01-13-2017, 09:35 AM #3
Accutronitis's Avatar
Class 3R Laser
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Accutronitis Accutronitis is online now
Class 3R Laser
Accutronitis's Avatar
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Could you put that into layman's terms ?
__________________
The Accutron Resource Forum your source for the best & most up to date Accuton 214 info On The Web Please Visit http://accutronfacts.freeforums.net/

---------------------------------------------------------------------------------------------------------------------------------------
My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - JL 10X Beam Expander Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - "Alien Laser" Donated NUBM44 6.8 Watts at 4.5 Amps 450nm Diode In A DTR 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb
Accutronitis is online now   Reply With Quote
Old 01-13-2017, 09:40 AM #4
HydroSean's Avatar
Class 2M Laser
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
HydroSean HydroSean is offline
Class 2M Laser
HydroSean's Avatar
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Quote:
Originally Posted by Accutronitis View Post
Could you put that into layman's terms ?
energy is inversely proportional to wavelength. the higher the wavelength, the lower the energy
HydroSean is offline   Reply With Quote
Old 01-13-2017, 01:50 PM #5
Accutronitis's Avatar
Class 3R Laser
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Accutronitis Accutronitis is online now
Class 3R Laser
Accutronitis's Avatar
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Quote:
Originally Posted by HydroSean View Post
energy is inversely proportional to wavelength. the higher the wavelength, the lower the energy
I see, Thanks......
__________________
The Accutron Resource Forum your source for the best & most up to date Accuton 214 info On The Web Please Visit http://accutronfacts.freeforums.net/

---------------------------------------------------------------------------------------------------------------------------------------
My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - JL 10X Beam Expander Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - "Alien Laser" Donated NUBM44 6.8 Watts at 4.5 Amps 450nm Diode In A DTR 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb
Accutronitis is online now   Reply With Quote
Old 01-13-2017, 02:45 PM #6
diachi's Avatar
Class 4 Laser
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,923
Rep Power: 25673
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
diachi diachi is online now
Class 4 Laser
diachi's Avatar
 
Join Date: Feb 2008
Location: Yellowknife, NT, Canada
Posts: 7,923
Rep Power: 25673
diachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond reputediachi has a reputation beyond repute
Send a message via Skype™ to diachi
Default Re: Why are blue lasers much higher output than green lasers ?

Quote:
Originally Posted by HydroSean View Post
energy is inversely proportional to wavelength. the higher the wavelength, the lower the energy
Quote:
Originally Posted by Accutronitis View Post
I see, Thanks......

That's not the reason though. It has nothing to do with it. 1W is 1W is 1W. 1W of 520nm is the same as 1W of 445nm, it's just that the 445nm needs to emit less photons to achieve that 1W output as each photon has more energy.

Differences in available materials as well as demand.

For pointers, DPSS is difficult to get up past 1W in that form factor, just the way DPSS works. You need active temperature control, more optics, lots of pump power etc. Hard to do in a small form factor. I've been around 532nm green lasers that are doing >40W average and a few kWs peak, but that took ~300lbs of cooling equipment, electronics and optical components to achieve. That said, those powers can be achieved much more efficiently and in much smaller form factors with modern technology.

For 520nm diode lasers, the technology is newer, it's had less time to develop. There may also be less demand for more powerful 520nm diodes. For displays you need less green power anyway as it's already a lot brighter than blue, so you may need say 4W of 445nm to match 1W of 520nm. Thus, no large scale demand for direct diode green more than a watt or so.
__________________


405nm | Banggood LT-850 | "5mW" | Review Unit | Review WIP
445nm | Sanwu Laser Pocket Series | 400mW Metered
445nm | NDB7242E Pen Build | 60mW Metered | >>Build Thread<<
450nm | LaserPointerStore - Thor H2 | 1W(?) | Review Unit | >>Review<<
488nm | Spectra Physics 163 Argon | ~30mW Metered
515nm | PL515 Pen Build | 50mW Metered | >>Build Thread<<
520nm | Laserlands 520 | 5mW | Review Unit | 3mW metered | >>Review<<
532nm | Gearbest 303 Pointer | 50mW Metered
532nm | Gearbest JD-850 Pointer | 30mW Metered (I think, need to re-test).
633nm | HeNe | 6mW
633nm | Spectra Physics 155 HeNe | <1mW >>Thread<<
650nm | Sanwu Laser Pocket Series | 200mW Metered
808nm | Melles Griot 532nm Lab Unit | No Crystals >10W | X2



Check out my Reddit Subreddit! >>/r/laserpointers<<


Last edited by diachi; 01-13-2017 at 03:07 PM.
diachi is online now   Reply With Quote
Old 01-13-2017, 02:48 PM #7
Eracoy's Avatar
Class 1 Laser
 
Join Date: Jul 2014
Posts: 90
Rep Power: 3185
Eracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond repute
Eracoy Eracoy is offline
Class 1 Laser
Eracoy's Avatar
 
Join Date: Jul 2014
Posts: 90
Rep Power: 3185
Eracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond reputeEracoy has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

For a single photon, yes, energy is directly proportional to frequency. Though, I'd imagine the total output is much more affected by efficiencies in diode technology.

Edit: Diachi beat me to the explaination and gave a more thorough one.
__________________
405nm 700mW S06J 12X
405nm 800mW BDR-209 16X
405nm 900mW BDR-209 16X
445nm 800mW M140
462nm 1800mW M462
470nm 4W+ NUBM07E
470nm+ 5A NUBM07E
510nm 100mW
520nm 200mW PLP520-B1
520nm 1400mW NDG7475
532nm 300mW
589nm 30mW Spartan
650nm 200mw
650nm 150mw
X10DR 10x Beam Expander

Last edited by Eracoy; 01-13-2017 at 02:49 PM.
Eracoy is offline   Reply With Quote
Old 01-13-2017, 02:55 PM #8
TheDukeAnumber1's Avatar
Class 3R Laser
 
Join Date: Jun 2012
Location: Illinois
Posts: 2,045
Rep Power: 1474
TheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond repute
TheDukeAnumber1 TheDukeAnumber1 is offline
Class 3R Laser
TheDukeAnumber1's Avatar
 
Join Date: Jun 2012
Location: Illinois
Posts: 2,045
Rep Power: 1474
TheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond reputeTheDukeAnumber1 has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Quote:
Originally Posted by HydroSean View Post
Quote:
Originally Posted by HydroSean View Post
energy is inversely proportional to wavelength. the higher the wavelength, the lower the energy
Setting aside you being incorrect, you should have known that first post wasn't helpful.
__________________
“Absence of evidence isn't evidence of absence."
http://laserpointerforums.com/donations.htm
[SIZE="1"]“It is impossible that any ill should happen to the man who is beloved of the Lord; the most crushing calamities can only shorten his journey and hasten him to his reward. Ill to him is no ill, but only good in a mysterious form. Losses enrich him, sickness is his medicine, reproach is his honour, death is his gain. No evil in the strict sense of the word can happen to him, for everything is overruled for good. Happy is he who is in such a case. He is secure where others are in peril, he lives where others die.”—Spurgeon
TheDukeAnumber1 is offline   Reply With Quote
Old 01-13-2017, 03:14 PM #9
Accutronitis's Avatar
Class 3R Laser
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Accutronitis Accutronitis is online now
Class 3R Laser
Accutronitis's Avatar
 
Join Date: Dec 2016
Location: Las Vegas
Posts: 1,064
Rep Power: 7442
Accutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond reputeAccutronitis has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Quote:
Originally Posted by diachi View Post
That's not the reason though. It has nothing to do with it. 1W is 1W is 1W. 1W of 520nm is the same as 1W of 445nm, it's just that the 445nm needs to emit less photons to achieve that 1W output as each photon has more energy.

Differences in available materials as well as demand.

For pointers, DPSS is difficult to get up past 1W in that form factor, just the way DPSS works. You need active temperature control, more optics, lots of pump power etc. Hard to do in a small form factor. I've been around 532nm green lasers that are doing >40W average and a few kWs peak, but that took ~300lbs of cooling equipment, electronics and optical components to achieve. That said, those powers can be achieved much more efficiently and in much smaller form factors with modern technology.

For 520nm diode lasers, the technology is newer, it's had less time to develop. There may also be less demand for more powerful 520nm diodes. For displays you need less green power anyway as it's already a lot brighter than blue, so you may need say 4W of 445nm to match 1W of 520nm. Thus, no large scale demand for direct diode green more than a watt or so.
Thanks ! That makes perfect sense !
__________________
The Accutron Resource Forum your source for the best & most up to date Accuton 214 info On The Web Please Visit http://accutronfacts.freeforums.net/

---------------------------------------------------------------------------------------------------------------------------------------
My very short laser collection (for now)

Thor "Saber" Americanised Thor M II - DTR M462 2.2 Watt 462mn Diode W/Super X-Drive @ 1.8 Amps - DTR G-2 lens - JL 10X Beam Expander Class IV

"Thor's Hammer" Americanised TLY-L201 Host Build W/Old School NASA Type Safety Switch - "Alien Laser" Donated NUBM44 6.8 Watts at 4.5 Amps 450nm Diode In A DTR 25mm Copper Module W/Driver - DTR G-2 lens - OPT Laser 6X Cylindrical Lens Pair Fast Axis Correction w/ Custom Made Beam Expander w/Jetlaser Output Lens Class IV

303 Prome Star Series Green Laser 532nm 80mW DPSS Class IIIb
Accutronitis is online now   Reply With Quote
Old 01-13-2017, 04:44 PM #10
Rivem's Avatar
Class 2M Laser
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 885
Rep Power: 7418
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Rivem Rivem is offline
Class 2M Laser
Rivem's Avatar
 
Join Date: Feb 2016
Location: New Mexico and/or Colorado, USA
Posts: 885
Rep Power: 7418
Rivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond reputeRivem has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Just to add a bit more on the diode laser side, the power levels mostly have to do with the properties of available semiconductor materials.

Every color of diode laser uses a different type of semiconductor to achieve a bandgap (energy difference) equivalent to its wavelength of light. Some of these semiconductors are just much more efficient than others.

Coming up with new wavelengths and dramatically improving efficiencies requires discovering new semiconductors or using novel techniques to change the quantum properties of lasing cavities.
__________________
Now in the Member Collections Section: Rivem's Collection.


Free after another brutal semester.
I'll still be a bit busy this summer, but expect to see more of me.
Rivem is offline   Reply With Quote
Old 01-16-2017, 12:59 AM #11
HydroSean's Avatar
Class 2M Laser
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
HydroSean HydroSean is offline
Class 2M Laser
HydroSean's Avatar
 
Join Date: Mar 2016
Location: Indiana
Posts: 522
Rep Power: 2235
HydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond reputeHydroSean has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

Quote:
Originally Posted by diachi View Post
That's not the reason though. It has nothing to do with it. 1W is 1W is 1W. 1W of 520nm is the same as 1W of 445nm, it's just that the 445nm needs to emit less photons to achieve that 1W output as each photon has more energy.

Differences in available materials as well as demand.

For pointers, DPSS is difficult to get up past 1W in that form factor, just the way DPSS works. You need active temperature control, more optics, lots of pump power etc. Hard to do in a small form factor. I've been around 532nm green lasers that are doing >40W average and a few kWs peak, but that took ~300lbs of cooling equipment, electronics and optical components to achieve. That said, those powers can be achieved much more efficiently and in much smaller form factors with modern technology.

For 520nm diode lasers, the technology is newer, it's had less time to develop. There may also be less demand for more powerful 520nm diodes. For displays you need less green power anyway as it's already a lot brighter than blue, so you may need say 4W of 445nm to match 1W of 520nm. Thus, no large scale demand for direct diode green more than a watt or so.
Yeah I forgot to include an explanation about the DPSS green lasers and that is totally true. But for just single diode InGaN lasers the reason is still due to Debroglie's law since these InGaN blue and green diodes use the same semiconductor dopants.

Last edited by HydroSean; 01-16-2017 at 01:00 AM.
HydroSean is offline   Reply With Quote
Old 01-16-2017, 02:48 AM #12
Class 3R Laser
 
Join Date: May 2011
Posts: 2,358
Rep Power: 24142
Encap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond repute
Encap Encap is offline
Class 3R Laser
 
Join Date: May 2011
Posts: 2,358
Rep Power: 24142
Encap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond reputeEncap has a reputation beyond repute
Default Re: Why are blue lasers much higher output than green lasers ?

There are many different laser technologies. The two that are used in pointers are DPSS and Direct diode.
You can read up on the differences between DPSS and Diode laser technology here: https://en.wikipedia.org/wiki/Laser_pointer and here: https://en.wikipedia.org/wiki/Diode-...id-state_laser and here: https://en.wikipedia.org/wiki/Diode_laser

If you are meaning by green 532nm green, 532nm green is only created by a DPSS process which is a much more expensive and complicated technology, requiring hand work and fine tuning and has better quality beam than low cost diode lasers. A 700mW 532nm from either laserbtb or jetlasers cost aprox $700 -- $1 per mW. So demand is small due to the expense. A DPSS laser is not something a hobbyist can build generally . 532nm green is so many times brighter to the eye than blue there is little if any call for anything more powerful than 1W as others have said. A 1w 532nm is much brighter than a 7W 445 see: http://lsrtools.1apps.com/relativebr...useRaleigh=off

Low cost mass produced direct diode lasers are much more affordable beause of the many products they are used in where the quality of the laser output does not really matter much. Since the development of direct diode 520nm green it has become popular due to low cost and availability as well. Hobbyist can easily make a pointer containing a direct diode laser---so they are the hobby for the most part.

Last edited by Encap; 01-16-2017 at 03:01 AM.
Encap is offline   Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 10:45 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC