butterfly laser

Jul 25, 2012 2 Replies

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John Larkin 13 years ago

Got this on ebay, milled the lid off to see what's inside.

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I haven't figured out the circuit with the inductor and, possibly, a parallel-plate capacitor. Bias tee?

The laser and feedback photodiode are apparently sitting on a TE cooler and maybe a BeO insulator block.

John Larkin Highland Technology, Inc jlarkin at highlandtechnology dot com http://www.highlandtechnology.com Precision electronic instrumentation Picosecond-resolution Digital Delay and Pulse generators Custom laser drivers and controllers Photonics and fiberoptic TTL data links VME thermocouple, LVDT, synchro acquisition and simulation

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Martin Riddle 13 years ago

I would say a TEC is in there , it?s a Type 2. pins 6&7 are the TEC. Your pictures don't show them well.

Cheers

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Phil Hobbs 13 years ago

Probably a bias tee. There's a standard pinout that has the LD connected via an inductor to one pin, and a resistor to another. The last one I used was like that.

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 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net

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