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The problem is that you usually either blow the front facet off, or else cause gross crystal damage in the active region. You wind up with an ugly beam with stripes in it. Personally I'd just risk damaging the monitor photodiode and scratch the back facet.

Classical fluctuations.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC 
Optics, Electro-optics, Photonics, Analog Electronics 

160 North State Road #203 
Briarcliff Manor NY 10510 

hobbs at electrooptical dot net 
http://electrooptical.net

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Hmm but at least I don't have to open up the little package. (I took one top off with a dremel grinding wheel, but it's a PITA) (A 5.6 mm package.)

I don't care about the monitor PD... but there's no room for me to fit my diamond scribe back there. I scratched the one I have open with a dental pick and flaked off a bit of the x-tal. I guess that was a bit aggressive :^) So does it need to be diamond? How ?bout a bit of crocus cloth on the end of a toothpick? It?d be really sweet to monitor the light output as scratch it... but that?s getting a bit carried away. (All I have to do is screw up the reflective coating on the back, no?)

George H.

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A dental pick is probably a good possibility. It's good to gouge it up fairly badly, because any reflection from there will give you ripples in your spectrum and it may eventually sort of lase.

I'd probably avoid crocus cloth because it tends to leave stuff behind IME. Maybe Harbor Freight has some little wires coated with diamond grit, or something like that?

The Chinese make skinny diamond grit wheels really cheap, so maybe a shard of one of those would work.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs 
Principal Consultant 
ElectroOptical Innovations LLC 
Optics, Electro-optics, Photonics, Analog Electronics 

160 North State Road #203 
Briarcliff Manor NY 10510 USA 
+1 845 480 2058 

hobbs at electrooptical dot net 
http://electrooptical.net

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Ahh, I think there's a diamond coated grinding tool in my dremel kit. George H.

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Perhaps a really tiny diamond dentist's burr? Chuck into in a pin vise to have working handle?

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Thankies.

?-)