Old 01-29-2014, 05:59 AM #1
Hap's Avatar
Hap Hap is online now
Super Moderator
 
Join Date: Sep 2013
Location: Arcata, CA, USA
Posts: 8,414
Rep Power: 21474874
Hap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond repute
Send a message via Skype™ to Hap
Hap Hap is online now
Super Moderator
Hap's Avatar
 
Join Date: Sep 2013
Location: Arcata, CA, USA
Posts: 8,414
Rep Power: 21474874
Hap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond repute
Send a message via Skype™ to Hap
Default What exactly is meany by a DPSS efficiency process?

Hey guys,

I searched online but couldn't find much to my question, all I found was mostly explaining how DPSS is less efficient then diodes(which I already knew )

My question is as follows: What exactly is meant by 9% efficiency/1% efficiency etc... when talking about "exotic wavelengths". For example, 473nm has a 9% efficiency rate, what exactly does that mean? In my mind, that means that only 9% of the total starting output ends up coming out of the aperture. Im sure im horribly wrong and any help would be most apprecited

Extra question: Dosen't 594nm/593.5nm have the worst efficiency out of all?

Thank you again,
Alex



PS: Just realized I spelt "meant" wrong on the thread title, oh well


__________________
635nm: Laserglow Libra 5mW *North Pole Edition*



"Open your eyes, look within. Are you satisfied with the life you're living?" -Bob Marley
"The stars should fall and the earth be riddled, imagine all your problems be seem so little, funny how the world so brittle." -Tribal Seeds
“The universe is a pretty big place. If it's just us, seems like an awful waste of space.” -Carl Sagan
You are important: Pale Blue Dot


Last edited by Hap; 01-29-2014 at 06:02 AM.
Hap is online now   Reply With Quote


















Old 01-29-2014, 01:06 PM #2
Blackwolf's Avatar
Class 2 Laser
 
Join Date: Jul 2013
Location: Wisconsin
Posts: 348
Rep Power: 489479
Blackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond repute
Blackwolf Blackwolf is offline
Class 2 Laser
Blackwolf's Avatar
 
Join Date: Jul 2013
Location: Wisconsin
Posts: 348
Rep Power: 489479
Blackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond reputeBlackwolf has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

that is how much pump power is converted into the wavelength of light that is being desired. 9% seems high for 473. that could possibly be the case in a lab unit but not a hand held. For example say you have a 2000mw 808nm diode pumping the crystals at 9% efficiency (2000*.09) you would get 180mw output power. that is a "perfect conditions" example though as you would need correct alignment and a few other variables too. 473 is hard to produce because 946nm is a weak line for Nd:YAG. the main line is 1064nm. Then it gets worse as you get to the doubling crystal: LBO. the problem with LBO is that it is only quasi-transparent to 946nm light meaning some light is lost in the crystal. to top it off the crystal is temperature sensitive too. If they would find a pump crystal whose principal wavelength is 946nm and a better doubling crystal 473nm light could be generated with super efficiency and cheaper too. here is how the people of the forums calculated 473nm efficiency
Quote:
I think its because 473nm DPSS is the most inefficient DPSS system we hobbyists got Calculated its around 0.007W/(0.9 driver efficiency * 0.45 808nm diode efficiency * 0.1 473nm DPSS efficiency)=0.172W total in best case its maybe only 0.05 DPSS efficiency
__________________
445nm "1W+" Polished Survival Lasers S4
450nm ???
470nm 5W custom polished MrCrouse tactical
473nm "5mW" Custom polished CNI glp-473
488nm WTB multi-line
515nm "30mw" Joker301 GB C6
520nm 1W Custom host? (2016)
543nm HeNe (WTB)
589nm (WTB PGL III C/Spartan)
594nm (WTB pen)
604nm or 612nm (want eventually)
633nm HeNe (2016)
635nm 345mW "Zraffle" Lazerer Rifle
685nm 35mW MXDL laser (2015)
3.7W Lpm Radiant X4 LPM with blue case (2015)

Last edited by Blackwolf; 02-13-2014 at 05:12 PM.
Blackwolf is offline   Reply With Quote
Old 01-29-2014, 01:27 PM #3
Hap's Avatar
Hap Hap is online now
Super Moderator
 
Join Date: Sep 2013
Location: Arcata, CA, USA
Posts: 8,414
Rep Power: 21474874
Hap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond repute
Send a message via Skype™ to Hap
Hap Hap is online now
Super Moderator
Hap's Avatar
 
Join Date: Sep 2013
Location: Arcata, CA, USA
Posts: 8,414
Rep Power: 21474874
Hap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond reputeHap has a reputation beyond repute
Send a message via Skype™ to Hap
Default Re: What exactly is meany by a DPSS efficiency process?

Quote:
Originally Posted by Blackwolf View Post
that is how much pump power is converted into the wavelength of light that is being desired. 9% seems high for 473. that could possibly be the case in a lab unit but not a hand held. For example say you have a 2000mw 808nm diode pumping the crystals at 9% efficiency (2000*.09) you would get 180mw output power. that is a "perfect conditions" example though as you would need correct alignment and a few other variables too. 473 is hard to produce because 946nm is a weak line for Nd:YAG. the main line is 1064nm. Then it gets worse as you get to the doubling crystal: LBO. the problem with LBO is that it is only quasi-transparent to 946nm light meaning some light is lost in the crystal. TO top it off the crystal is temperature sensitive too. If they would find a pump crystal who's principal wavelength is 946nm and a better doubling crystal 473nm light could be generated with super efficiency and cheaper too. here is how the people of the forums calculated 473nm efficiency

Wow, thank you Blackwolf!
I finally got it now.

Nevertheless, I think the idea of which process really is less efficient is debatable, but hey....As long as I get my 473nm light im good
__________________
635nm: Laserglow Libra 5mW *North Pole Edition*



"Open your eyes, look within. Are you satisfied with the life you're living?" -Bob Marley
"The stars should fall and the earth be riddled, imagine all your problems be seem so little, funny how the world so brittle." -Tribal Seeds
“The universe is a pretty big place. If it's just us, seems like an awful waste of space.” -Carl Sagan
You are important: Pale Blue Dot


Last edited by Hap; 01-29-2014 at 01:31 PM.
Hap is online now   Reply With Quote
Old 01-29-2014, 01:34 PM #4
Zeebit's Avatar
Class 3R Laser
 
Join Date: Aug 2012
Location: PH
Posts: 1,125
Rep Power: 115
Zeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond repute
Zeebit Zeebit is offline
Class 3R Laser
Zeebit's Avatar
 
Join Date: Aug 2012
Location: PH
Posts: 1,125
Rep Power: 115
Zeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond reputeZeebit has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

Simply put, efficiency=(power in/power out)
Zeebit is offline   Reply With Quote
Old 01-29-2014, 07:02 PM #5
Class 3B Laser
 
Join Date: May 2011
Posts: 4,484
Rep Power: 21474861
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 3B Laser
 
Join Date: May 2011
Posts: 4,484
Rep Power: 21474861
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: What exactly is meany by a DPSS efficiency process?

Here are a couple of articles on the subject to help you understand parameters that effect efficiency:

http://soeagra.com/iaast/vol2/1.pdf

Optics for DPSS Lasers: Finding a Balance | Features | Oct 2013 | Photonics Spectra
Encap is offline   Reply With Quote
Old 01-29-2014, 07:05 PM #6
DJNY's Avatar
Class 4 Laser
 
Join Date: Nov 2009
Location: Austria
Posts: 5,995
Rep Power: 2449
DJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond repute
DJNY DJNY is offline
Class 4 Laser
DJNY's Avatar
 
Join Date: Nov 2009
Location: Austria
Posts: 5,995
Rep Power: 2449
DJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond reputeDJNY has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

Quote:
Originally Posted by Encap View Post
Here are a couple of articles on the subject to help you understand parameters that effect efficiency:

http://soeagra.com/iaast/vol2/1.pdf

Optics for DPSS Lasers: Finding a Balance | Features | Oct 2013 | Photonics Spectra
He don´t wanna read articles -or the many useful post according this topic on the forums-, but getting spoon feed
__________________
405nm >> Wickedlasers SONAR by lazeerer peak@968mW
445nm >> Kryton Smooth by lazeerer peak@2075mW
453nm >> Lipstick by rhd peak@158mW
473nm >> Optotronics RPL-B peak@112mW
515nm >> Skylasers HL peak@41mW
532nm >> Novalasers Alpha HP peak@284mW
589nm >> CNI PGL-III-A peak@89mW
594nm >> Laserglow Rigel peak@4mW
635nm >> MXDL by DTR peak@38mW
642nm >> Saillaser peak@23mW
660nm >> CR2 by lazeerer peak@524mW
685nm >> MXDL by lazereer peak@42mW

Above lasers measured with an Ophir nospin LPM


- - - - - - - - -
Interested? >> Click onto the laser titles for more information
- - - - - - - - -


Note that Imageshack is automatically resizing some of my older
pictures back to original full-size after a while.
DJNY is offline   Reply With Quote
Old 01-29-2014, 10:28 PM #7
hakzaw1's Avatar
Class 4 Laser
 
Join Date: Apr 2009
Location: 'Deep in the Heart Of Texas..."
Posts: 8,962
Rep Power: 21474881
hakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond repute
hakzaw1 hakzaw1 is online now
Class 4 Laser
hakzaw1's Avatar
 
Join Date: Apr 2009
Location: 'Deep in the Heart Of Texas..."
Posts: 8,962
Rep Power: 21474881
hakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond reputehakzaw1 has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

^^^ what he said..
But I will add this
my DPSS lasers really hate this cold weather we are having- just tried my 473 JL ProPl-E and I bet I saw less than 1mW with the laser being around 45 F- same with a green pointer- very dim at first- I allowed it to warm a little and then it came on bright for a second then went very dim as I repeated this each time it stayed bright longer until it finally stayed on brightly..

BTW.. doing lots of On and Off repeatedly in NOT a good thing to do. but as this 4$usd green at 90 mW was uber cheap I don't have much to lose..

conclusion----- most DPSS work poorly when too cold. I tried a red(104mW) and BR (89mw) pointer (also from the same 4$ Greedbay china seller) and they work as well cold as warmed up...

amazing you can get close to a combined RGV 300mW for just 12$$$$usd
__________________
IF YOU ARE NEW HERE- READ ALL THIS http://laserpointerforums.com/f37/an...ml#post1353314
& Spend some hours reading at LASERPOINTERSAFETY.COM

powered by PANGOLIN-ILDA Member 2014: to 2017:

QS/FB3 +Beyond-APC40-Mamba Black(clone) 5paghettix2 and I-show x2-Kasio synth-midi
KGB- 532 1.1W 445 2.2W 655 1.3W DT Pro 40 still needs more red.
KGB1W+ 532 DT Pro 40 soon to be GB.
Laserking 1300RGB FULL COLOR 30K(may be FS)
Laserking RGB LK PD2 500 and LK SD 850
REKE RGB 500- G 300
HeNes-(12)R(3)G-COH-594/5 mW-thnx DrSam
MULTILINE-147mW[
445nm 180mW-Mini spiro-Yob.
LPMs-RadiantAlpha& Pro5W-AixiZ SPER/KenmeterLite/LB1
Spacelas 1178mW 655nm/AixiZ 300mW532&
2 B&W 473nm 5/6mW lab
JETLRS1.3W&1.2W-MGL-H
638 180mW ttl mimi lab (av. 230mW)
405 100mW ttl mini lab
445 300 mW ttl mni lab ^AixiZ^ all for a lumia PJ
*MightyMite 2000* RGB all diode 2.2W 30K- 637/520./450...NEW!!
Guide DIY Pjs by Dan-

Last edited by hakzaw1; 01-29-2014 at 10:33 PM.
hakzaw1 is online now   Reply With Quote
Old 01-30-2014, 01:14 AM #8
ultimatekaiser's Avatar
Class 3B Laser
 
Join Date: Mar 2013
Location: Colorado, USA
Posts: 2,798
Rep Power: 3648484
ultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond repute
Send a message via Skype™ to ultimatekaiser
ultimatekaiser ultimatekaiser is offline
Class 3B Laser
ultimatekaiser's Avatar
 
Join Date: Mar 2013
Location: Colorado, USA
Posts: 2,798
Rep Power: 3648484
ultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond reputeultimatekaiser has a reputation beyond repute
Send a message via Skype™ to ultimatekaiser
Default Re: What exactly is meany by a DPSS efficiency process?

Quote:
Originally Posted by Blackwolf View Post
that is how much pump power is converted into the wavelength of light that is being desired. 9% seems high for 473. that could possibly be the case in a lab unit but not a hand held. For example say you have a 2000mw 808nm diode pumping the crystals at 9% efficiency (2000*.09) you would get 180mw output power. that is a "perfect conditions" example though as you would need correct alignment and a few other variables too. 473 is hard to produce because 946nm is a weak line for Nd:YAG. the main line is 1064nm. Then it gets worse as you get to the doubling crystal: LBO. the problem with LBO is that it is only quasi-transparent to 946nm light meaning some light is lost in the crystal. TO top it off the crystal is temperature sensitive too. If they would find a pump crystal who's principal wavelength is 946nm and a better doubling crystal 473nm light could be generated with super efficiency and cheaper too. here is how the people of the forums calculated 473nm efficiency
Well.....the high power 473nm lasers tend to use a potassium niobate. it is transparant for the whole visible range we can see (though it struggles with purple (400-2000nm if i remember right)) but they're far more expensive than LBO crystals. I have a few, that are about half the size of an LBO but cost far far more. they also have a much higher Nonlinear coefficient than both LBO and KTP crystals. It's simply a matter of cost vs benefit.
__________________
Available on Skype and Discord(#3241)
325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

405nm: Melles Griot RCS
430nm: Coherent D3 430-10
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
457.9nm: Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, CNI GLP-473-5
476.5nm: Argon Ion Line

480nm: Coherent Sapphire Custom
483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics Cyan 488-20 DECSL, Coherent Sapphire

496.5nm: Argon Ion Line
501.7: Argon Ion Line
514.5nm: Argon Ion Line
520nm: Trustfire A8 Custom

532nm: Coherent Genesis MX Taipan OPSL, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

552nm: Coherent Obis LS
561nm: Melles Griot 85-YCA-015, Coherent Sapphire
568nm: Omni-643RYB Whitelight Line

577nm: Coherent Genesis MX OPSL
583.8nm: DPSS line
586.2nm: DPSS line
588.6nm: CNI PGL-M-80

591nm: DPSS line
593.5nm CNI MGL-H-50 Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm: Raman HeNe line
611.8nm: Melles Griot LOR-150 HeNe, LOR-006 HeNe

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.6nm: Laser Quantum IGNIS DPSS laser 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby

1152.6nm: SP-120 HeNe alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors

Last edited by ultimatekaiser; 01-30-2014 at 01:15 AM.
ultimatekaiser is offline   Reply With Quote
Old 01-30-2014, 11:06 AM #9
Pi R Squared's Avatar
Class 3B Laser
 
Join Date: May 2013
Location: Snohomish County Washington, US
Posts: 3,798
Rep Power: 3254476
Pi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond repute
Pi R Squared Pi R Squared is offline
Class 3B Laser
Pi R Squared's Avatar
 
Join Date: May 2013
Location: Snohomish County Washington, US
Posts: 3,798
Rep Power: 3254476
Pi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond reputePi R Squared has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

This may also be of interest: http://www.repairfaq.org/sam/dpss1.gif you can see from their more complex design why they aren't so efficient and why they break more easily.

Alan
__________________
Keychain 650nm <5mW
Quartet 4-in-1 630-680nm <1mW

AtlasNova 635nm <5mW
MillionAccessories 532nm <5mW broken
M462 462nm one of a kind (in progress)
PLTB450B 450nm 1913mW G2 lens
PL520 520nm 82mW acrylic lens
S06J 12X 405nm 590mW G2 lens
C6 M140 445nm 1.5W 3 element lens
9mm 445nm with G2 lens in a stainless steel host
Radiant Electronics X4 3.7W Laser Power Meter


Everyone please post here: Countries of LPF. Where are you? <link>
___________________________________________
The light that shines twice as bright burns half as long.
Pi R Squared is offline   Reply With Quote
Old 01-30-2014, 04:34 PM #10
BShanahan14rulz's Avatar
Class 3B Laser
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 178381
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
BShanahan14rulz BShanahan14rulz is offline
Class 3B Laser
BShanahan14rulz's Avatar
 
Join Date: Dec 2009
Posts: 3,175
Rep Power: 178381
BShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond reputeBShanahan14rulz has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

Should be noted that it is different from what is commonly referred to as "Wall plug efficiency." In lighting, this is not a unitless ratio, but instead a ratio of lumens per watt. Lumens is a dumb unit to use for monochromatic light, so I'm not sure what the real name for electrical power in per optical power out ratio is, but the process efficiency is most definitely talking about the optical power in per power out ratio.
BShanahan14rulz is offline   Reply With Quote
Old 01-31-2014, 07:59 PM #11
trencheel303's Avatar
Class 3R Laser
 
Join Date: Dec 2013
Location: Brexitville
Posts: 1,394
Rep Power: 2722339
trencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond repute
trencheel303 trencheel303 is online now
Class 3R Laser
trencheel303's Avatar
 
Join Date: Dec 2013
Location: Brexitville
Posts: 1,394
Rep Power: 2722339
trencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond reputetrencheel303 has a reputation beyond repute
Default Re: What exactly is meany by a DPSS efficiency process?

Quote:
Originally Posted by hakzaw1 View Post
^^^ what he said..
But I will add this
my DPSS lasers really hate this cold weather we are having- just tried my 473 JL ProPl-E and I bet I saw less than 1mW with the laser being around 45 F- same with a green pointer- very dim at first- I allowed it to warm a little and then it came on bright for a second then went very dim as I repeated this each time it stayed bright longer until it finally stayed on brightly..

BTW.. doing lots of On and Off repeatedly in NOT a good thing to do. but as this 4$usd green at 90 mW was uber cheap I don't have much to lose..

conclusion----- most DPSS work poorly when too cold. I tried a red(104mW) and BR (89mw) pointer (also from the same 4$ Greedbay china seller) and they work as well cold as warmed up...

amazing you can get close to a combined RGV 300mW for just 12$$$$usd
This caveat of no power at cold temperatures is something I've found to be a real problem with low powered DPSS units like 532nm pens. They simply can't warm up enough in the cold and so run like crap, although it means you get an unlimited duty cycle.
__________________
405 532 589 635 | 473 445 593.5 650

My YouTube Channel

trencheel303 is online now   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



























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 03:59 AM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC