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 02-01-2014, 09:45 AM #1
Junior Member
 
Join Date: Jan 2014
Posts: 2
Rep Power: 0
joblessalex is on a distinguished road
joblessalex joblessalex is offline
Junior Member
 
Join Date: Jan 2014
Posts: 2
Rep Power: 0
joblessalex is on a distinguished road
Default CD Laser and KTP

Hi, I have been building lasers for a while now but still know very little on IR. I pulled a cd burner diode and was told it was either 790 or 808nm. I put the crystal in front of it and no change in color at all. What is required to get it to work?


joblessalex is offline   Reply With Quote







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







Old 02-01-2014, 10:21 AM #2
DashApple's Avatar
Class 3R Laser
 
Join Date: Jan 2009
Posts: 1,353
Rep Power: 5965
DashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond repute
DashApple DashApple is online now
Class 3R Laser
DashApple's Avatar
 
Join Date: Jan 2009
Posts: 1,353
Rep Power: 5965
DashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond reputeDashApple has a reputation beyond repute
Default Re: CD Laser and KTP

Well if its 808nm ( I think it wont be ) , you are still missing the vanadate to generate the 1064nm for the KTP to SHG to 532nm and still you need mounts and they have to be correctly a lined


I think you should start reading online about the DPSS process and IR diodes ..
__________________


Stuck In The places I Hated The Most , Reboot My Memory , Restart My heart , Seal Up All Of My Wounds Take Me Back To The Start !
Rip Me To Peices , Replace What You Can , Bury The Rest And Build A New Me To Plan !
DashApple is online now   Reply With Quote
Old 02-01-2014, 11:00 AM #3
Class 2 Laser
 
Join Date: Mar 2013
Location: Berlin ; Germany
Posts: 315
Rep Power: 83
shokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond repute
shokkunlasers shokkunlasers is offline
Class 2 Laser
 
Join Date: Mar 2013
Location: Berlin ; Germany
Posts: 315
Rep Power: 83
shokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond repute
Default Re: CD Laser and KTP

KTP and LBO or BIBO aren't magical frequency converters

Theoretically you could sum 1/780nm+1/780nm=2/780nm=390nm
but they don't convert any polarization and power efficient

They need high powers to work efficient and those high powers are normally achieved by putting the crystal into the cavity of the laser you want to convert by SHG or using a q-switched laser with high pulse energy.

Both of those won't work with laser diodes
That makes it hard to do
I know that Coherent and others make direct diode doubled lasers
but
1. they are experts and have tools we can't think of
2. they don't use KTP but LBO and more efficient crystals
3. they correct the diodes output to near TEM00
4. they also use at least 1W pump power not a 200mW cd laser diode
shokkunlasers is offline   Reply With Quote
Old 02-01-2014, 12:24 PM #4
Junior Member
 
Join Date: Jan 2014
Posts: 2
Rep Power: 0
joblessalex is on a distinguished road
joblessalex joblessalex is offline
Junior Member
 
Join Date: Jan 2014
Posts: 2
Rep Power: 0
joblessalex is on a distinguished road
Default Re: CD Laser and KTP

Well that sure ruined my day. I bought a 5mw green pointer and tore it down. It had only 1 crystal in front of the diode, does that mean it was already 1064?
If such a laser is doubled with a single crystal in that laser, what makes 808nm not a 404nm output? Power and efficiency were not a goal, just a color change. I'll have a look at DPSS lasers and see what I can learn. Thanks for pointing me in the right direction!
joblessalex is offline   Reply With Quote
Old 02-01-2014, 12:44 PM #5
Class 2 Laser
 
Join Date: Mar 2013
Location: Berlin ; Germany
Posts: 315
Rep Power: 83
shokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond repute
shokkunlasers shokkunlasers is offline
Class 2 Laser
 
Join Date: Mar 2013
Location: Berlin ; Germany
Posts: 315
Rep Power: 83
shokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond reputeshokkunlasers has a reputation beyond repute
Default Re: CD Laser and KTP

In cheap laser pointers KTP and YVO4 are glued together that's why it looks like a single crystal
shokkunlasers is offline   Reply With Quote
Old 02-01-2014, 06:22 PM #6
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: CD Laser and KTP

Yes it's a.bit harder than just putting the crystal in front of the diode. You need to achieve a certain threshold to lase the yvo4, with a good steady focused beam profile (which the diode alone can't usually give), and the polarizations have to match, angle is important, cleanliness of the crystal, (no fingerprints which ruin the coatings or dust) etc. this is high level physics, and not something so easy to do quickly. There's a lot of factors involved.

Also, cd diodes are 780nm. You need a steady 808nm for this process.
__________________
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; 02-01-2014 at 06:23 PM.
ultimatekaiser 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











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 01:24 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