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MK-88 Diode Pumped Eye-Safe Microlaser


SS 1-10Hz, 4mj, 6ns Diode Pumped Eye-Safe Laser

MK-88   

"Eye-safe" 1.54 μm diode pumped
passively q-switched Erbium glass
laser transmitter with integrated
photodiode



Wavelength1535nm
Laser Energy3+ mJ
Pulse Repetition RateSS –10 Hz
Laser Pulse Width≈ 6 ns
Raw Beam Diameter0.8 mm
Beam Divergence (D4σ method)≤ 4.2 mrad
M2≤ 1.7
Beam Wander≤ 0.5 mrad
Laser HeadSize (in inches)0.85 x 2.00 x 3.00
Laser Head Size(incm)2.16 x 5.08 x 7.62
Laser HeadWeight≈ 175 g
Laser Operational Temperature-30 to +50 C
Laser Storage Temperature-55 to +71 C
Electrical Requirements8V, 100 A, < 3 ms
Conductive Cooling Requirements< 24 W
Integrated Photodiode?Yes

MK-88 Duty Cycle Engineering Notes

HESP lasers are conductively cooled. They are typically mounted to a metal heat sink. A fan and heat sink or a water cooled baseplate may also be used to remove heat.

A good method for monitoring the laser's internal temperature is to look at the pump current pulse width. Specifically, this pulse width should not exceed 3 milliseconds. You'll notice that the pump pulse width will increase as the laser heats up. This is due to the loss of efficiency. Once the pump pulse width gets beyond 3mS, the efficiency of the laser drops dramatically and the pump pulse width will rise quickly - indicating an overheated condition. Please do not operate the laser if the pump current pulse width exceeds 3mS.

We suggest the use of a Tektronix model # A622 probe. The probe should be located between the driver and the laser. You can clip on a section of the red wire anywhere in the laser cable.

Datasheet for current probe:
http://www2.tek.com/cmswpt/psdetails.lotr?ct=PS&ci=13510&cs=psu&lc=EN

To purchase the probe:
http://www.alliedelec.com/search/productdetail.aspx?SKU=7000622


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