Laser Diode Feedback Signal for Position Sensing Using Self-Mixing Interference
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概要
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We modified a digital versatile disk (DVD) pickup head as a DVD actuator with a laser diode package for sensing. Tuning a tilting coil in the DVD actuator causes the tilt of a laser diode to compensate misalignment between a target surface and the laser diode facet. Experimental results show that tuning the tilting coil compensates misalignment between both surfaces to achieve effective self-mixing signal. Furthermore, we present the conformity between the output voltage and the target surface displacement from a laser diode package using the self-mixing effect. The resolution in linear region of self-mixing signal is 100 mV/nm.
- 2009-03-25
著者
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Tsai Meng-yen
Department Of Chemical Engineering National Taiwan Institute Of Technology
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Liu Tzong-Shi
Department of Mechanical Engineering, Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.
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Tsai Meng-Yen
Department of Mechanical Engineering, Chiao Tung University, Hsinchu 30010, Taiwan, R.O.C.
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Schlesinger Tuviah
Department of Electrical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
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Schlesinger Tuviah
Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, U.S.A.
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