Old 09-09-2015, 04:19 PM #1
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Default NDB7242E Diode Update

So a wile back I did a group buy for these diodes and when I posted the pics people were disappointed because they thought they were single mode.
http://laserpointerforums.com/f65/50...150-90173.html


well at selem I Compared one of these diodes to a Pl450 single mode diode and was stunned to find that these diodes had ever so slight better specs.



From left to right are as follows Pl450, 594nm HeNe, and NDB7242E

Dr Sam who was at the event said these diodes are most likely single mode despite what the spec sheet says.

I am ashamed to say I did not take distance measurements .


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Old 09-10-2015, 03:51 PM #2
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Default Re: NDB7242E Diode Update

Yesterday I finally completed putting my NDB7242E diode into a pen laser host. I have it set at approximately 80mA. I tried to measure the divergence at ~200ft and the NDB7242E was twice the size of my 450nm laser BTB (same one used in laserman121's picture).

Here's the data.
It looks like I got my NDB7242E diode at 0.96mR. And my BTB laser is at 0.54mR.
I'm not sure I got the diode optimally focused so I'll try again tonight to see if I can get it better.
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Noteworthy Lasers and λ's:
1064nm: SSY-1
685nm: 24mW pen
676.4nm: Ar/Kr (only during warmup)
660nm: ~200mW ML101U29
647.1nm: Omnichrome 643 Ar/Kr 6-line max (high hours)
638nm/635nm: 600mW Kryton Groove - 6mW DIY pen
632.8nm: SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent from Sigurthr - 1.7mW REO-LHYR-0050M
~575nm coming eventually...
568.2nm: Ar/Kr
~565nm coming eventually...
543.5nm: 3.1mW Coherent
532nm/537nm/542nm/545nm/550nm multi-line DPSS
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
503nm: ~10mW leadlight
514.5nm/501.7nm/496.5nm/488.0nm/476.5nm/465.8nm/457.9nm Argon Ion
494nm: ~40mW C6
475nm: ~10mW leadlight
473nm: <5mW B&W Tek
462nm: 2W M462 Kryton Groove
450nm/445nm: 2.5W NDB7875 Kryton Groove - 40mW NDB7242E Pen
405nm: 100mW PHR-805T
DIY RGB laser projector
Several B&W spectrometers

Building: 337.1nm: TEA laser, 2.5W 532nm Halfnote. 3-4 stage Peltier Supercooled 638nm... (target λ of 625nm @ <-40‎C)

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Last edited by Mattronium; 09-10-2015 at 03:59 PM.
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Old 09-10-2015, 09:38 PM #3
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Default Re: NDB7242E Diode Update

What lens did you use.
The 3 elements get better divergence.
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593.5nm 100mW CNI Lab Dead driver
604nm LHOR-0150 2nd line
612nm 2.1mW LHOR-0150
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632.8nm .4mW Spectra Physics 155 HeNe
Sold
635nm 15mW Module
650nm 5mW red
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Last edited by lazerman121; 09-10-2015 at 09:54 PM.
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Old 09-11-2015, 03:23 PM #4
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Default Re: NDB7242E Diode Update

I'm using the basic acrylic lens that comes with the modules.

I just did a another test at 165ft and got 0.6mR for the NDB7242E diode and 0.4mR for my 450nm BTB.
I'll try the 3-element 445 coated lens and report back.
I think I'll also try to measure the beam diameter at something like 800ft
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Noteworthy Lasers and λ's:
1064nm: SSY-1
685nm: 24mW pen
676.4nm: Ar/Kr (only during warmup)
660nm: ~200mW ML101U29
647.1nm: Omnichrome 643 Ar/Kr 6-line max (high hours)
638nm/635nm: 600mW Kryton Groove - 6mW DIY pen
632.8nm: SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent from Sigurthr - 1.7mW REO-LHYR-0050M
~575nm coming eventually...
568.2nm: Ar/Kr
~565nm coming eventually...
543.5nm: 3.1mW Coherent
532nm/537nm/542nm/545nm/550nm multi-line DPSS
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
503nm: ~10mW leadlight
514.5nm/501.7nm/496.5nm/488.0nm/476.5nm/465.8nm/457.9nm Argon Ion
494nm: ~40mW C6
475nm: ~10mW leadlight
473nm: <5mW B&W Tek
462nm: 2W M462 Kryton Groove
450nm/445nm: 2.5W NDB7875 Kryton Groove - 40mW NDB7242E Pen
405nm: 100mW PHR-805T
DIY RGB laser projector
Several B&W spectrometers

Building: 337.1nm: TEA laser, 2.5W 532nm Halfnote. 3-4 stage Peltier Supercooled 638nm... (target λ of 625nm @ <-40‎C)

"Fiat Lux" - preferably laser light.

Last edited by Mattronium; 09-11-2015 at 03:32 PM.
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Old 10-09-2015, 03:03 AM #5
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Default Re: NDB7242E Diode Update

Any updates have you had time to try a 3 element glass lens.
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405nm violet(blue-ray) laser-eBay
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445nm 80mW NDB7242E DIY build
473nm 10mW LSR473NL series blue laser module www.lasever.com Review
488nm 5mW Novalux Protera DPSS Laboratory Unit Review
515nm 20mW module
532nm 200mW Suwtech Lab laser
532nm 100mW Suwtech Lab laser

543.5nm .5mW Research Electro-optics Inc Helium Neon
561nm 4.98mW CNI GLP OEM module Review
593.5nm 100mW CNI Lab Dead driver
604nm LHOR-0150 2nd line
612nm 2.1mW LHOR-0150
632.8nm Melles Griot Bare Tube (05-LHR-004-347)
632.8nm .4mW Spectra Physics 155 HeNe
Sold
635nm 15mW Module
650nm 5mW red
1 Laservision Style F12.T5H04.5000 (O_O)

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Old 10-09-2015, 07:41 PM #6
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Default Re: NDB7242E Diode Update

Quote:
Originally Posted by lazerman121 View Post
Any updates have you had time to try a 3 element glass lens.
Unfortunately no, I've been very busy and haven't found time to.
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"SAFETY FIRST, LAST AND ALWAYS" -> Laser Safety Information

Mattronium's Laser Collection (with links to build threads etc.)

Noteworthy Lasers and λ's:
1064nm: SSY-1
685nm: 24mW pen
676.4nm: Ar/Kr (only during warmup)
660nm: ~200mW ML101U29
647.1nm: Omnichrome 643 Ar/Kr 6-line max (high hours)
638nm/635nm: 600mW Kryton Groove - 6mW DIY pen
632.8nm: SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent from Sigurthr - 1.7mW REO-LHYR-0050M
~575nm coming eventually...
568.2nm: Ar/Kr
~565nm coming eventually...
543.5nm: 3.1mW Coherent
532nm/537nm/542nm/545nm/550nm multi-line DPSS
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
503nm: ~10mW leadlight
514.5nm/501.7nm/496.5nm/488.0nm/476.5nm/465.8nm/457.9nm Argon Ion
494nm: ~40mW C6
475nm: ~10mW leadlight
473nm: <5mW B&W Tek
462nm: 2W M462 Kryton Groove
450nm/445nm: 2.5W NDB7875 Kryton Groove - 40mW NDB7242E Pen
405nm: 100mW PHR-805T
DIY RGB laser projector
Several B&W spectrometers

Building: 337.1nm: TEA laser, 2.5W 532nm Halfnote. 3-4 stage Peltier Supercooled 638nm... (target λ of 625nm @ <-40‎C)

"Fiat Lux" - preferably laser light.
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