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. (C) 2009 The Japan Society of Applied Physics.
|Journal||Japanese Journal of Applied Physics|
|State||Published - Mar 2009|
|Event||18th Joint International Symposium on Optical Memory/24th Optical Data Storage Symposium - Big Isl, HI|
Duration: 13 Jul 2008 → 17 Jul 2008
- HEIGHT CONTROL; FLYING HEIGHT; PICKUP HEAD; STORAGE; CAVITY