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 > Gas Lasers



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



Reply
 
LinkBack Thread Tools Display Modes
Old 04-29-2015, 09:35 AM #1
Junior Member
 
Join Date: Apr 2015
Location: UK
Posts: 5
Rep Power: 0
Olwood is on a distinguished road
Olwood Olwood is offline
Junior Member
 
Join Date: Apr 2015
Location: UK
Posts: 5
Rep Power: 0
Olwood is on a distinguished road
Default 337 nm pulsed Nitrogen laser energy output

I'm struggling to get an energy reading from a pyro electric laser energy meter measuring one of my pulsed nitrogen lasers. On another similar similar laser readings are fine, so I assume the meter is working fine. These are research grade lasers meant for ionisation. Both lasers produce visible fluorescence from white card placed in the beam line. The beams are attenuated to prevent damage to the meter.

Could this be a sign of needing to change the plasma cell on the problematic laser? I'm reluctant to test the beam unattenuated as I don't want to damage the meter.

Thanks.


__________________
337 nm Spectra-Physics 4 ns pulsed Nigrogen laser (<0.3 mJ/pulse)
337 nm LSI 3 ns pulsed Nitrogen laser (<0.1 mJ/pulse)

355 nm Coherent Flare pulsed laser
532 nm 5 mW diode (alignment)
650 nm 1 mW diode (alignment)
Olwood is offline   Reply With Quote







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







Old 05-01-2015, 12:52 AM #2
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: 337 nm pulsed Nitrogen laser energy output

You're using a thermal LPM, right? (Pyroelectric implies such, unless it is an obscure brand name). N2 lasers are short pulse width emissions, and generally limited in repetition rate unless it's a flowing gas system. It's likely you've over-attenuated the beam or the pulse width is too short to register a thermal change large enough on the sensor.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 05-01-2015, 05:49 AM #3
ultimatekaiser's Avatar
Class 3B Laser
 
Join Date: Mar 2013
Location: Colorado, USA
Posts: 2,664
Rep Power: 6793
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
ultimatekaiser ultimatekaiser is online now
Class 3B Laser
ultimatekaiser's Avatar
 
Join Date: Mar 2013
Location: Colorado, USA
Posts: 2,664
Rep Power: 6793
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
Default Re: 337 nm pulsed Nitrogen laser energy output

Quote:
Originally Posted by Sigurthr View Post
You're using a thermal LPM, right? (Pyroelectric implies such, unless it is an obscure brand name). N2 lasers are short pulse width emissions, and generally limited in repetition rate unless it's a flowing gas system. It's likely you've over-attenuated the beam or the pulse width is too short to register a thermal change large enough on the sensor.
this is probably exactly it. only certain meters can read short pulses like that (mine can, up to a few joules ) and only between certain power ranges.
__________________
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
476.5nm: Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser, Coherent Sapphire 488-20 OPSL

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

532nm: CNI MGL-F-3W, Coherent Genesis MX Taipan OPSL, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm: Coherent Genesis MX Taipan 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 (5mW), LOR-006 HeNe (0.5mW)

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 Laser

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

Last edited by ultimatekaiser; 05-12-2015 at 08:15 AM.
ultimatekaiser is online now   Reply With Quote
Old 05-01-2015, 06:35 AM #4
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
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: 9,142
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: 337 nm pulsed Nitrogen laser energy output

specs of the energy meter and both lasers would be helpful to know.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 05-01-2015, 07:12 AM #5
Junior Member
 
Join Date: Apr 2015
Location: UK
Posts: 5
Rep Power: 0
Olwood is on a distinguished road
Olwood Olwood is offline
Junior Member
 
Join Date: Apr 2015
Location: UK
Posts: 5
Rep Power: 0
Olwood is on a distinguished road
Default Re: 337 nm pulsed Nitrogen laser energy output

Thank you for the replies. The meter is a thermal LPM, yes. I will add the specs later today.

The laser specs are:
- up to 400 uJ per pulse
- 0 - 20 Hz
- 4 ns pulse width


Meter specs

Molectron J9LP 8096
519 V/J @1064 nm

This does work with a similar pulsed laser so I suspect over attenuation is to blame.

Last edited by Olwood; 05-01-2015 at 08:34 AM. Reason: Added meter specs
Olwood is offline   Reply With Quote
Old 05-01-2015, 10:39 PM #6
Cyparagon's Avatar
Class 4 Laser
 
Join Date: Sep 2007
Location: Wisconsin
Posts: 9,142
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: 9,142
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: 337 nm pulsed Nitrogen laser energy output

Google says the Molectron J9LP is rated for 2uJ to 20mJ, so the meter will be safe, and will even perform better with no attenuation.
__________________
A problem well stated is a problem half solved.
Cyparagon is online now   Reply With Quote
Old 05-01-2015, 10:46 PM #7
Junior Member
 
Join Date: Apr 2015
Location: UK
Posts: 5
Rep Power: 0
Olwood is on a distinguished road
Olwood Olwood is offline
Junior Member
 
Join Date: Apr 2015
Location: UK
Posts: 5
Rep Power: 0
Olwood is on a distinguished road
Default

Quote:
Originally Posted by Cyparagon View Post
Google says the Molectron J9LP is rated for 2uJ to 20mJ, so the meter will be safe, and will even perform better with no attenuation.
Thank you for this. I will perform assessment with no attenuation next week.
Olwood 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 03:03 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