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David Notebook: Difference between revisions
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==Daily Log==
'''9/25/14'''
Ran threshold tests with the diode today--performance seemed good! Better than I had previously seen and better than what Josh had described. There are still multiple peaks at low power (although over a much smaller range than previously) and with the power up to ~0.5 mW (without well adjusted feedback), there is a single very clear spike in power when adjusting grating position.
'''9/24/14'''
I've continued to have 1555 diode problems. Threshold tests were showing many small peaks of similar power. These individual peaks were generally single mode, but as I increased the current it went multi-mode well before reaching operating power. Deniz thought this was indicative of a failing diode, although Josh says this is consistent with the normal behavior he's observed (but that maybe it has never been working correctly). I tried re-collimating the laser and also moving the diode in the housing and re-tuning the grating and collimation. Neither of these procedures helped.
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