TSP #196 - Tutorial & Experiments on Tunable Semiconductor Lasers & Wavelength Locking Methods
In this video Shahriar dives into the world of tuneable semiconductor lasers. First, a Santec TSL-200 source is presented and repaired. The performance of the instrument is verified using a multi-wavelength meter. A DFB gold box laser module is then presented along with a demonstration showing the sensitivity of the laser diode to temperature variations. The entire wavelength locking mechanism of the DFB laser is presented in details along with the principle operation of an Etalon wavelength interferometer. The teardown of the module shows all its inner workings.
The LightSquare product and its teardown is also shown which includes a diffraction wavelength measurement system. Finally the operation of the TSL-200 tuneable semiconductor laser is presented which uses a tuneable external cavity Fabry-Perot laser. Finally the teardown of the multi-wavelength meter is shown along with the operation of the Michelson Interferometer inside.
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