LASER Below Threshold Explained

  / edmundsj  
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In this video, I calculate the total output power of a laser below threshold, and show how it kinda-sorta-not-really acts like an LED. We use a couple of mathematical tricks to get there, including defining the spontaneous recombination efficiency, and assuming we are in steady-state (the derivative of all things with respect to time is zero).

This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.

Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.