Reading a CD-ROM without a photodiode

Michael J. Wishon; G. Mourozeau; K. Ng; A. A. Sahai; Alexandre Locquet; D. S. Citrin

doi:10.1117/12.2227815

28 April 2016 Reading a CD-ROM without a photodiode

Michael J. Wishon, G. Mourozeau, K. Ng, A. A. Sahai, Alexandre Locquet, D. S. Citrin

Proceedings Volume 9892, Semiconductor Lasers and Laser Dynamics VII; 98921Z (2016) https://doi.org/10.1117/12.2227815
Event: SPIE Photonics Europe, 2016, Brussels, Belgium

Abstract

We use a laser diode from a commercial CD/DVD-ROM drive to detect changes in the surface of a diffraction grating without a photodiode. Specifically, we exploit the changing terminal voltage in the laser-diode due to changing feedback strength as the laser is rastered across the grating's surface.

Citation Download Citation

Michael J. Wishon, G. Mourozeau, K. Ng, A. A. Sahai, Alexandre Locquet, and D. S. Citrin "Reading a CD-ROM without a photodiode", Proc. SPIE 9892, Semiconductor Lasers and Laser Dynamics VII, 98921Z (28 April 2016); https://doi.org/10.1117/12.2227815

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