Title :
Optical Feedback Height Control System Using Laser Diode Sensor for Near-Field Data Storage Applications
Author :
Fang, Jen-Yu ; Tien, Chung-Hao ; Shieh, Han-Ping D. ; Herget, Philipp ; Bain, James A. ; Schlesinger, T.E.
Author_Institution :
Nat. Chiao Tung Univ., Hsinchu
Abstract :
We demonstrated a laser diode position sensor for a near-field height control system. The feedback signal of the laser diode sensor that resulted from self-mixing interferometry was characterized and modeled by a simplified method. Due to the fine spatial resolution of the laser sensor, an active height control system with nanoscale position precision was designed and realized under a spinning disk for near-field applications.
Keywords :
laser feedback; light interferometry; optical sensors; optical storage; position control; data storage; laser diode sensor; nanoscale active control; near-field height control system; optical feedback; self-mixing interferometry; Control systems; Diode lasers; Laser feedback; Memory; Optical control; Optical feedback; Optical sensors; Sensor phenomena and characterization; Sensor systems; Sensor systems and applications; Data storage; laser sensor; nanoscale active control; self-mixing interferometry;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.909349
