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David Notebook: Difference between revisions
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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 (from ~0.5 mW to 1.3 mW) when adjusting grating position.
I'm not sure whether the old diode was bad, or if it was just the process of completely re-aligning this new one with the grating that ultimately improved performance. If it was the re-alignment, I think park of the trick was changing the horizontal grating adjustment to close to the middle position--maybe we were at too extreme an angle before to get good feedback. If we need to adjust the wavelength later it might be better to do what we can with temperature before moving the grating too much.
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