Optical waveguides – Polarization without modulation
Reexamination Certificate
2006-10-31
2006-10-31
Font, Frank G. (Department: 2883)
Optical waveguides
Polarization without modulation
C385S027000, C359S199200, C359S341500, C359S341100
Reexamination Certificate
active
07130495
ABSTRACT:
Characteristics are rendered variable and high-functional by using the side-pressure inductive polarization mode coupling of a PMF to thereby change the position and magnitude of a side pressure. An input light is incident via a polarizer (2), and an outgoing light is output via the PMF (1) and another polarizer (3). Light may enter and go out in an opposite way. The PMF (1) has two polarization axes orthogonal to each other, and the polarization axis of the polarizer (2) is coupled so as to agree with one end of the polarization axis of the PMF (1). The polarization axis of the polarizer (3) is coupled so as to agree with one end of the polarization axis of the PMF (1). The PMF (1) induces polarization mode coupling when a polarization light tilted a specified angle with respect to the polarization axis is incident to apply a side pressure to the PMF (1). Characterstics/functions can be changed by changing the position and the magnitude of a side pressure by an application unit (5) so that the length of the PMF (1) of a basic structure can be easily set precisely.
REFERENCES:
patent: 4529262 (1985-07-01), Ashkin et al.
patent: 4666255 (1987-05-01), Taylor et al.
patent: 4801189 (1989-01-01), Shaw et al.
patent: 4923290 (1990-05-01), Brinkmeyer et al.
patent: 5018859 (1991-05-01), Chang et al.
patent: 6417948 (2002-07-01), Chowdhury et al.
patent: 6556732 (2003-04-01), Chowdhury et al.
patent: 6630658 (2003-10-01), Bohnert et al.
patent: 63-249827 (1988-10-01), None
patent: 05-323396 (1993-12-01), None
patent: 09-33872 (1997-02-01), None
IPER PCT/JP01/02031, Oct. 14, 2003.
Okamoto et al., All-Panda-Fiber Multi/Demultiplexer Utilizing Polarization Beat Phenomenon in Birefringent Fibers, Electronics Leters, vol. 22, No. 4, pp. 181-182, Feb. 1986.
Noda et al., Polarization-maintaining Fibers and Their Application, Journal of Lightwave Technology, vol. LT-4, No. 8, pp. 1071-1089, Aug. 1986.
Tsubokawa et al., Mode Coupling Due to External Forces Distributed Along a Polarization-Maintaining Fiber: an Evaluation, Applied Optics, vol. 27, No. 1, pp. 166-173, Jan. 1988.
Shimizu et al, Highly Practical Fiber Squeezer Polarization Controller, Journal of Lightwave Technnology, vol. 9, No. 10, pp. 1217-1224, Oct. 1991.
Ozeki, T., Optical Equalizer, Optics Letters, vol. 17, No. 5, pp. 375-377, Mar. 1992.
Sharma et al., Optical Circuit for Equalizing Group Delay Dispersion of Optical Fibers, Journal of Lightwave Techology, vol. 12, No. 108, pp. 1759-1765, Oct. 1994.
Jinguji et al.,Synthesis of Coherent Two-Port Lattice-Form Optical Delay-Line Circuit; Journal of Lightwave Techology, vol. 13, No. 1, pp. 73-82, Jan. 1995.
Fang et al., Polarization-Independent All-Fiber Wavelength-division Multiplexer Based on a Sagnac Interferometer, Optice Letters, vol. 20, No. 20, pp. 2146-2148, Oct. 1995.
Fnag et al., A Compound High-Order Polarization—independent Birefringence Filter Using Sagnac Interferometer, IEEE Photonic Technology Letters, vol. 9, No. 4, pp. 458-460, Apr. 1997.
Saida et al., Distributed Fiber-Optic Stress Sensor by Synthesis of the Optical Coherence Function; IEEE Photonic Technology Letters, vol. 9, No. 4, pp. 484-486, Apr. 1997.
Tanaka et al., Fibre Optic Spectral Polarimetry for Sensing Multiple Stress-Loaded Locations Along a Length of Fibre, IEE Proc.-Optoelectron., vol. 144, No. 3, pp. 176-182, Jun. 1997.
Yamashita et al., A Distributed Fiber Laser Stress Sensor, Technical Report of IEICE, OFT2000-45, pp. 7-12, Sep. 2000.
Yamashita et al., Multiwavelength Fiber Lasers with Tunable Wavelength Spacing, PLANC, pp. 355-357, Mar. 2001.
Teruyuki Baba “Multiwavelength Fiber Lasers with Tunable Wavelength Spacing” The Institute of Electronics, Information and Communication Engineers, Sogo Taikai Koen Ronbunshu Electronics, XP-002955856, P355 Japan, Mar. 7, 2001.
Xiaojun Fang “Polarization-independent all fiber wavelength-division multiplexer based on a Sagnac Interferometer” Optics Letters, XP00532387, Oct. 15, 1995, 2146-2148, New York, USA.
European Patent Office Search Report for PCT/JP02/020301, Feb. 7, 2006.
Communication Pursuant to Article 96(2) EPC, Apr. 16, 2006.
Communication Pursuant to Article 96(2) EPC, Oct. 23, 2005.
Paul Humphrey “Fiber-Birefringence Tuning Technique for an Erbium-Doped Fiber Ring Laser” IEEE Photonics Technology Letters, Jan. 5, 1993, New York, USA.
Font Frank G.
Hughes James P.
Japan Science and Technology Corporation
Neifeld IP Law PC
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