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





Welcome to Laser Pointer Forums! 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 > Blue, Yellow, & Other Colored Lasers



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



Reply
 
LinkBack Thread Tools Display Modes
Old 07-19-2012, 12:19 PM #1
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
CoryG CoryG is offline
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
Default Underpowering a 910nm 100W pump diode

I'm looking at getting some of the diodes rated at 100W - would it be safe to underpower these (same input voltage, low current) as a means to control the output intensity? I'm going to use them as pumps for a fiber laser and though it will be rated at 400W I would like to have better variation than 100W steps.


CoryG is offline   Reply With Quote







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







Old 07-19-2012, 12:23 PM #2
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,793
Rep Power: 43174
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,793
Rep Power: 43174
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by CoryG View Post
I'm looking at getting some of the diodes rated at 100W - would it be safe to underpower these (same input voltage, low current) as a means to control the output intensity? I'm going to use them as pumps for a fiber laser and though it will be rated at 400W I would like to have better variation than 100W steps.
Almost any Diode Lasers max power can be dialed down to
lower powers by decreasing it's drive current.


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-19-2012 at 12:23 PM. Reason: Spelling errors
lasersbee is offline   Reply With Quote
Old 07-19-2012, 12:25 PM #3
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
CoryG CoryG is offline
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by lasersbee View Post
Almost any Diode Lasers max power can be dialed down to
lower powers by decreasing it's drive current.


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
Thanks, that is what I had suspected but wanted some degree of confirmation before attempting it and possibly burning out some expensive diodes.

I attached a PDF of the part I'm going to be using (couldn't find a link to it online anywhere) - if anyone is interested I'll send you the contact info of the sales rep I've been speaking to.
Attached Files
File Type: pdf XL100WP100IRC910.pdf (267.9 KB, 305 views)
CoryG is offline   Reply With Quote
Old 07-19-2012, 12:52 PM #4
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,793
Rep Power: 43174
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,793
Rep Power: 43174
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by CoryG View Post
Thanks, that is what I had suspected but wanted some degree of confirmation before attempting it and possibly burning out some expensive diodes.

I attached a PDF of the part I'm going to be using (couldn't find a link to it online anywhere) - if anyone is interested I'll send you the contact info of the sales rep I've been speaking to.

http://laserpointerforums.com/attach...p100irc910.pdf
That s NOT a Laser Diode... That is an LED.
Reading the specs you can easily see that the Max Current
for that device is only 350mA...
There is no way it will produce 100W of Laser light or 100W
of any wavelength of light...


Jerry


You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner

Last edited by lasersbee; 07-19-2012 at 12:55 PM. Reason: Spelling errors
lasersbee is offline   Reply With Quote
Old 07-19-2012, 12:56 PM #5
jeffreythe00's Avatar
Class 3B Laser
 
Join Date: Jan 2010
Location: USA, Plains, Pennsylvania
Posts: 2,528
Rep Power: 781
jeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond repute
Send a message via Skype™ to jeffreythe00
jeffreythe00 jeffreythe00 is offline
Class 3B Laser
jeffreythe00's Avatar
 
Join Date: Jan 2010
Location: USA, Plains, Pennsylvania
Posts: 2,528
Rep Power: 781
jeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond reputejeffreythe00 has a reputation beyond repute
Send a message via Skype™ to jeffreythe00
Default Re: Underpowering a 910nm 100W pump diode

Like lasersbee said yes you can under drive any diode without problems. However depending on the application you may want to consider that under driving may cause the wavelength to shift. The same goes for over driving as well. If that's not of concern then the next thing you should look into is the lazing threshold. If you try to run the diode under its threshold it may not power up. Check your data sheet beforehand to make sure.

Otherwise you should be fine.
__________________
Want to be a part of the member map? Pm me!

Personal lasers
532nm 130mW Spartan
532nm 160mW Wicked lasers EVO
532nm 130mW Wicked Lasers Executive Pro: Nexus

520nm 1.4W Ehgemus custom
660nm >78mW Newwish
635nm 500mW 501B
445nm >1W 1st Gen Kryton Groove
445nm >2.7W DeadEYmo Custom
473nm 25mW re-tuned B&W Tek Labby
Wicked Lasers Torch
Radiant x4 LPM
jeffreythe00 is offline   Reply With Quote
Old 07-19-2012, 02:12 PM #6
Class 1 Laser
 
Join Date: Jan 2011
Posts: 77
Rep Power: 10
nouthyella is just really nicenouthyella is just really nicenouthyella is just really nicenouthyella is just really nice
nouthyella nouthyella is offline
Class 1 Laser
 
Join Date: Jan 2011
Posts: 77
Rep Power: 10
nouthyella is just really nicenouthyella is just really nicenouthyella is just really nicenouthyella is just really nice
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by lasersbee View Post
That s NOT a Laser Diode... That is an LED.
Reading the specs you can easily see that the Max Current
for that device is only 350mA...
There is no way it will produce 100W of Laser light or 100W
of any wavelength of light...


Jerry


You can contact us at any time on our Website: J.BAUER Electronics
Tolerance of measurement of peak Wavelength 2.0nM
The spec sheet says wavelength +- 2nm, that seems to imply that it is a laser diode, unlikely that an LED can produce that kind of output.
Or the maker could simply be pulling it from their rear. I certainly agree that it looks far more like an LED.
__________________
445nm ~1500mA Moh Guidesman / DTR Self Build
445nm 2200mW lazeerer build
532nm ~30mW Random Overspec 5mW

Last edited by nouthyella; 07-19-2012 at 02:13 PM.
nouthyella is offline   Reply With Quote
Old 07-19-2012, 02:17 PM #7
lasersbee's Avatar
Class 4 Laser
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,793
Rep Power: 43174
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
lasersbee lasersbee is offline
Class 4 Laser
lasersbee's Avatar
 
Join Date: Sep 2008
Location: Quebec, Canada
Posts: 15,793
Rep Power: 43174
lasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond reputelasersbee has a reputation beyond repute
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by nouthyella View Post
Tolerance of measurement of peak Wavelength 2.0nM
The spec sheet says wavelength +- 2nm, that seems to imply that it is a laser diode, unlikely that an LED can produce that kind of output.
Or the maker could simply be pulling it from their rear. I certainly agree that it looks far more like an LED.
Laser Diodes have specs for Threshold Current and Output Power
in mW. This device does not...


Jerry


You can contact us at any time on our Website: J.BAUER Electronics
__________________

J.BAUER Electronics Home Page

LaserBee Laser Power Meter Products meet your needs
at affordable Prices:
See them all here on LPF

LaserBee Power Meter products ALWAYS in Stock
and ready to ship

Also available on eBay:Check availability here..

Subsidary: Pharma Electronic Solutions


This banner is available to and can be copied/used FREE by any LaserBee owner
lasersbee is offline   Reply With Quote
Old 07-19-2012, 04:04 PM #8
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
CoryG CoryG is offline
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by lasersbee View Post
Laser Diodes have specs for Threshold Current and Output Power
in mW. This device does not...


Jerry


You can contact us at any time on our Website: J.BAUER Electronics
It's an array of LEDs in a single package - it is not a laser diode but it is a diode I can use as a pump. You don't need laser diodes to pump a laser with.

It has 100 elements rated at 1000mA for the pulse forward current.

Last edited by CoryG; 07-19-2012 at 04:06 PM.
CoryG is offline   Reply With Quote
Old 07-19-2012, 06:34 PM #9
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Underpowering a 910nm 100W pump diode

100W is input power, not output power. And that's Chinese watts, not real watts. 350mA per die at 1.3V per die times 100 dies is closer to 45W.

Spectral bandwidth is 60nm, which means the light is spread 30nm on either side of the 910 central wavelength.

I'm not sure why they have two different ratings for radiant power, but it looks to be 2.25W per string of 10, although 50% efficiency is a little optimistic.

I really don't think the power density is high enough to use this as a pump. You cannot focus it either because of the massive emitting area.

What is the lasing medium?
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 07-19-2012, 06:48 PM #10
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
CoryG CoryG is offline
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by Cyparagon View Post
100W is input power, not output power. And that's Chinese watts, not real watts. 350mA per die at 1.3V per die times 100 dies is closer to 45W.

Spectral bandwidth is 60nm, which means the light is spread 30nm on either side of the 910 central wavelength.

I'm not sure why they have two different ratings for radiant power, but it looks to be 2.25W per string of 10, although 50% efficiency is a little optimistic.

I really don't think the power density is high enough to use this as a pump. You cannot focus it either because of the massive emitting area.

What is the lasing medium?
If that's the case I may need to keep looking. I'm using Yttrium-doped fiber as the lasing medium so 30nm pretty much fits the curve, though I would like to get closer to 15nm. I'm looking at some pigtailed GRIN lenses as the input aperture for the fiber - do you know a good method for loosely collimating multiple light sources? It looks like no matter where I look 100W is about the best I'll get from a single light source and my target is 200W minimum, 400W ideal maximum.
CoryG is offline   Reply With Quote
Old 07-20-2012, 01:31 AM #11
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
CoryG CoryG is offline
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by CoryG View Post
If that's the case I may need to keep looking. I'm using Yttrium-doped fiber as the lasing medium so 30nm pretty much fits the curve, though I would like to get closer to 15nm. I'm looking at some pigtailed GRIN lenses as the input aperture for the fiber - do you know a good method for loosely collimating multiple light sources? It looks like no matter where I look 100W is about the best I'll get from a single light source and my target is 200W minimum, 400W ideal maximum.
An update on this - I inquired about the rating and was told the PDF had a typo - I attached the new one they sent me. They quoted me $530 for 10 pieces or for a single piece if I order 10 (waiting on clarification before deciding whether or not I want to place the order).
Attached Files
File Type: pdf XL100WP100IRC910.pdf (315.8 KB, 187 views)
CoryG is offline   Reply With Quote
Old 07-20-2012, 03:24 AM #12
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Cyparagon Cyparagon is online now
Class 4 Laser
Cyparagon's Avatar
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,144
Rep Power: 9321
Cyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond reputeCyparagon has a reputation beyond repute
Default Re: Underpowering a 910nm 100W pump diode

Heheh, since when is IR good for sterilization?
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 07-20-2012, 03:31 AM #13
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
CoryG CoryG is offline
Junior Member
 
Join Date: Jul 2012
Posts: 10
Rep Power: 0
CoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the roughCoryG is a jewel in the rough
Default Re: Underpowering a 910nm 100W pump diode

Quote:
Originally Posted by Cyparagon View Post
Heheh, since when is IR good for sterilization?
Probably just a generic PDF with data changed around - but definitely not ordering from them. Apparently the "$530/PCS" bit that had me confused actually meant to say "$530/PC" in the original and 2 subsequent emails. Can definitely find cheaper, even if I have to hand-solder some SMT LEDs.
CoryG 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 09:25 AM.


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