Title :
High-Resolution FMCW Reflectometry Using a Single-Mode Vertical-Cavity Surface-Emitting Laser
Author :
Iiyama, Koichi ; Matsui, Shin-ichiro ; Kobayashi, Takao ; Maruyama, Takeo
Author_Institution :
Sch. of Electr. & Comput. Eng., Kanazawa Univ., Kanazawa, Japan
fDate :
6/1/2011 12:00:00 AM
Abstract :
High-resolution frequency-modulated continuous-wave (FMCW) reflectometry is realized by using a single-mode vertical-cavity surface-emitting laser (VCSEL) as a frequency-swept light source for the first time. The optical frequency of the VCSEL is swept by the injection current modulation. The experimental spatial resolution of 250 μm was achieved, which is the best value when an injection current tuned laser diode is used as a frequency-swept light source.
Keywords :
frequency modulation; laser cavity resonators; laser tuning; light sources; measurement by laser beam; optical modulation; reflectometry; semiconductor lasers; surface emitting lasers; VCSEL; frequency-swept light source; high-resolution FMCW reflectometry; high-resolution frequency-modulated continuous-wave reflectometry; injection current modulation; injection current tuned laser diode; single-mode vertical-cavity surface-emitting laser; spatial resolution; Frequency modulation; Laser tuning; Optical interferometry; Optical variables control; Spatial resolution; Vertical cavity surface emitting lasers; Frequency-modulated continuous-wave (FMCW) reflectometry; optical frequency domain reflectometry (OFDR); reflectometry; vertical-cavity surface-emitting laser (VCSEL);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2011.2131124
