Laser Diode Feedback Signal for Position Sensing Using Self-Mixing Interference

Meng Yen Tsai*, Tzong-Shi Liu, Tuviah E. Schlesinger

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

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.
Original languageEnglish
Article number03A007
JournalJapanese Journal of Applied Physics
Volume48
Issue number3
DOIs
StatePublished - Mar 2009
Event18th Joint International Symposium on Optical Memory/24th Optical Data Storage Symposium - Big Isl, HI
Duration: 13 Jul 200817 Jul 2008

Keywords

  • HEIGHT CONTROL; FLYING HEIGHT; PICKUP HEAD; STORAGE; CAVITY

Fingerprint Dive into the research topics of 'Laser Diode Feedback Signal for Position Sensing Using Self-Mixing Interference'. Together they form a unique fingerprint.

Cite this