title: In-line rotation sensor based on VCSEL behavior under polarization-rotating optical feedback.
abstract: Lasing behavior of a single-transverse-mode vertical-cavity surface-emitting laser (VCSEL) was observed while the polarization direction of an optical feedback was rotated. Optical powers of two polarization modes of a VCSEL showed sinusoidal dependences on the polarization-rotation angle. The power variation was seen when an optical feedback ratio was larger than -20 dB, though the variation depth dropped suddenly as the feedback ratio became smaller than -25 dB. An in-line type rotation sensor utilizing this behavior is proposed. The sensor system was constructed and the detection principle was demonstrated.
authors: Department of Electronics, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan. ura@kit.ac.jp
authors: Shogo
authors: S
authors: Ura
authors: Shinichiro
authors: S
authors: Shoda
authors: Kenzo
authors: K
authors: Nishio
authors: Yasuhiro
authors: Y
authors: Awatsuji
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005246:Feedback; D007834:Lasers; D008027:Light; D010783:Photometry / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D012399:Rotation; D014159:Transducers