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DIRECTLY-INJECTED 515nm GREEN-
EMITTING DIODE LASER MODULE
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Directly-Injected 515nm Green Diode Laser Module, retail $61.60 (www.instapark.com...)
Manufactured by (Unknown) for Instapark (www.instapark.com)
Last updated 02-02-14

This is a green-emitting diode laser.
But it's not DPSS (Diode-Pumped Solid State) like those now-common green laser pens -- no, this one uses a new technological advancement that allows green laser radiation to be produced directly, without the need for those messy, fragile nonlinear crystals!

It's rated to produce 5mW of laser radiation at 515nm in the bluish-green part of the spectrum (these values were measured at 9mW with a wavelength of 513.380nm).

This is part # 594SD52005 on Instapark's website.

Because this is a laser, you should not shine it into your eyes, other people's eyes, pet's eyes, etc. Just use a little common sense here, k?

Size of product w/hand to show scale

SIZE

To use your shiny new (and yes, as of late-2013 this technology is SHINY NEW and not CORRODED OLD!

) Directly-Injected 515nm Green Diode Laser Module, affix the heatsink first (it simply slips over the metal part of the laser) and hand-tighten the plastic screw on its side. This screw can be manipulated with the fingers (no tools necessary); please do not use a screwdriver or else you'd risk overtightening and/or stripping the threads on it.

THIS HEATSINK IS VERY IMPORTANT; THE DIODE WILL HEAT UP QUITE RAPIDLY AND MAY FAIL WITHOUT IT IN PLACE!!!

Feed the laser anywhere from +2.5 volts to +5.5 volts DC from any convenient source -- this could be two or three AA cells connected in series, a product like the Aixiz Diode Laser PSU, or even a lithium-ion 18650 cell like the type that powers the 2 Watt S3 Spyder Arctic G2 445nm Blue Laser w/SmartSwitch™.

As usual, red wire is (+) positive and black wire is (-) negative.

If you wish to have a power (on/off) switch, you'll have to procure & install it yourself. The two wires on the switch go to the laser module's red wire and the battery (+) positive.

My Aixiz Diode Laser PSU was used to power the laser module for all of the measurements, analyses, and beam photographs present on this web page.

This portable laser requires a source of +2.5 to +5.5 volts DC, whether that comes from two or three 1.5 volt batteries in series or an AC power supply. Therefore, I do not have to tell you which part to remove, kick down the basement stairs into that dark little room crawling with thousands of hungry piss ants with full pissinary bladders, and then rather emphatically tell you not to.

The Directly-Injected 515nm Green Diode Laser Module is not water-resistant or submersible (it's a laser module for Christ sakes!!!), so please keep it away from water.

The published specs on this laser module are as follows:

Emission Wavelength: 510nm to 530nm

Optical Dot Power :4.0mW to 5.0mW (Top* = 77°F (25°C)
Operation Temperature Range: 14°F (-10°C) to 122°F (+50°C)
Operating Current: <265mA
Operating Voltage: +2.5 volts to +5.5 volts DC
Beam Size @ 15m: 9mm (slow axis) X 15mm (fast axis)
Operation Temperature Range**: -4°F (-20°C) to 140°F (+60°C)

Below, you'll find my power output and spectrographic findings (both measured with instruments specifically designed for this purpose).

Attempted macro photograph of one side of the circuit board.

Attempted macro photograph of the other side of the circuit board.

Another attempted macro photograph of one side of the circuit board.

Another attempted macro photograph of the other side of the circuit board.

Tops out at 9mW on a LaserBee 2.5W USB Laser Power Meter w/Thermopile.

I later measured a power output of 4.90mW on a Sper Scientific Pocket Laser Power Meter # 840011.

Mid-term (2,185 seconds) stability analysis.
Laser temperature was measured at 104°F (40°C) at 2,170 seconds into the test.

Beam photograph on the test target at 12".

Beam photograph on the test target at 12"; the other (the yellower one toward the top) green spot is coming from my Evo Smartphone-Controllable Green DPSS Portable Laser outputting the same power.

Beam photograph on a wall at ~15 feet.

Spectrographic analysis of this laser.

Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 510nm and 520nm to pinpoint wavelength, which is 513.380nm.

Spectrographic analysis of this laser; spectrometer's response narrowed to a band between 800nm and 874nm to check for the presence of a pump laser -- which none exists (I irradiated the spectrometer's sensor quite well in effort to capture this!)

Spectral line halfwidth analysis

Spectral line halfwidth (FWHM) analysis; FWHM appears to be 2.10nm.

The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/44/515green.txt

USB2000 Spectrometer graciously donated by P.L.

A beam cross-sectional analysis would normally appear here, but the computer that hosted the ProMetric 8 Beam Cross-Sectional Analyser was destroyed by a lightning strike in July 2013 (the monitor had this big-ass hole blown right through its viewscreen); although a replacement computer is already en route (it just came several days ago actually), there's a fairly significant chance that the beam cross-sectional analyser itself was also taken out because both the computer & test instrument shared the AC power at the same outlet on the same power strip.

TEST NOTES:
Test unit was purchased on Ebay on 11-13-13, and the wrong unit was received on 11-18-13; the correct one was received on 11-25-13.

* Top = ambient operating temperature

** Yes, this value is stated two times in the operational materials; two differing temperature ranges are given.

UPDATE: 12-03-13
Just a subjective observation here...this laser module makes all 532nm green DPSS laser modules and portable lasers look much more yellowish than they used to.

PROS:
Very unique beam color -- 515nm is very radiant and unusual
Beam is clean with no unwanted artifacts or speckling in it

NEUTRAL:
Seems to run a bit warm

CONS:
None that I've yet to discover

Unknown

Laser module

Directly-injected green-emitting diode laser

Very narrow spot -- it's a laser, remember?

N/A

Fiberglass (PCB) & metal

Metal; laser diode & collimating lens recessed into hosel for them

N/A (uses any source of +2.5 V to +5.5 V that can source 265mA)

150.380 mA at +3.860 volts

NADEVVO'!!! PATAT, 'OQQARMEY LO' HO' TEYWI' PUM VAJ UN-FLUSHED PUCHPA', GHOBE'!

Toroidal (doughnut-shaped) heatsink

26mm L (incl. driver circuit) x 5.50mm Dia.

1.20g (0.040 oz.)

Unknown/not stated

Directly-Injected 515nm Green Diode Laser Module * www.instapark.com...

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