Optical: systems and elements – Optical frequency converter – Dielectric optical waveguide type
Reexamination Certificate
2005-04-12
2005-04-12
Spector, David N. (Department: 2873)
Optical: systems and elements
Optical frequency converter
Dielectric optical waveguide type
C359S326000, C385S122000
Reexamination Certificate
active
06879433
ABSTRACT:
A wavelength converter which employs an optical fiber and has high converter efficiency. The polarization planes of a signal light and an exciting light outputted from a laser diode (LD) (103) are respectively controlled by polarization controllers (PC's) (101and104) and the phases of the lights are respectively modulated by phase modulators (PM's) (102and105) in accordance with modulation signals outputted form an oscillator (110). Then, the output lights form the PM's (102and105) are multiplexed by a coupler (106). After the multiplexed signal light and exciting light are amplified by an optical amplifier (EDFA) (107), they are imputed to a dispersion shift fiber (DSP) (108). After wavelength transformation (four light waves mixing (FWM) is practiced in the DSP, and FWM light is outputted through a band-pass filter (BPF) (109).
REFERENCES:
patent: 5386314 (1995-01-01), Jopson
patent: 6307984 (2001-10-01), Watanabe
patent: 0 862 078 (1998-09-01), None
patent: 1306718 (2003-05-01), None
International Application PCT/JP00/06867 filed Oct. 3, 2000, International Publication No. WO 02/03132 A1 published Jan. 10, 2002.
PCT International Search Report of International Application PCT/JP00/06867 filed Oct. 3, 2000, International Publication No. WO 02/03132 A1 published Jan. 10, 2002.
Abstract: Japanese Publication No. 08-095093 published Apr. 12, 1996, Japanese Application No. 06-230018, filed Sep. 26, 1994, of Nippon Telegr & Teleph Corp, inventor Inoue Yasushi, pertains to Wave Length Conversion Device.
Publication: “Design Of Highly Efficient Four-Wave Mixing Devices Using Optical Fibers” by Kazuro Kikuchi and Chaloemphon Lorattanasane of Department of Electronic Engineering, University of Tokyo, Tokyo Japan, published byIEEE Photonics Technology Letters,vol. 6, No. 8 Aug. 1994.
Publication: “Interband Wavelength Conversion of 320 Gb/s(32×10 Gb/s)WDM Signal Using A Polarization-Insensitive Fiber Four-Wave Mixer” by Shigeki Watanabe, Shinichi Takeda and Terumi Chikama of Fujitsu Laboratories, Ltd., Kawaski, Japan, published byECOC 98,Sep. 20-24, 1998, Madrid, Spain.
Torii Ken-ichi
Yamashita Shinji
Japan Science and Technology Agency
Spector David N.
Tolpin Thomas W.
Welsh & Katz Ltd.
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