Demonstration of high extinction ratio modal interference in a two-mode fiber and its applications for all-fiber comb filter and high-temperature sensor

We show that high extinction ratio (>20 dB) modal interference in a two-mode dispersion compensating fiber can be utilized to build a compact, easy-to-fabricate tunable all-fiber optical comb filter. Wavelength tunability over the full free spectral range of the comb filter is demonstrated with a...

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Bibliographic Details
Published in:Optics communications 2005-06, Vol.250 (4), p.280-285
Main Authors: Li, Qun, Lin, Chien-Hung, Tseng, Pao-Yi, Lee, Henry P.
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
General equipment and techniques
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
Optical fibers
Optical filters
Optical sensors
Other fiber-optical devices
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
Sensors, gyros
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Summary:We show that high extinction ratio (>20 dB) modal interference in a two-mode dispersion compensating fiber can be utilized to build a compact, easy-to-fabricate tunable all-fiber optical comb filter. Wavelength tunability over the full free spectral range of the comb filter is demonstrated with an electrical power of 115mW using an on-fiber thin film micro-heater deposited directly on the fiber. In another configuration, the comb filter is used as a temperature sensor with dynamic range of >300 °C and sensitivity of
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2005.02.030