Coherent light generators – Particular active media – Semiconductor
Patent
1991-11-06
1992-10-13
Gonzalez, Frank
Coherent light generators
Particular active media
Semiconductor
372102, H04L 522
Patent
active
051557371
ABSTRACT:
A wide band distributed Bragg reflector having a reflectivity extremely greater than that of a narrow band distributed Bragg reflector mirror portion on the output side of a bistable type wavelength conversion device is arranged on the incident side. The input light in TM polarization mode is used as an input signal light and the wavelength conversion is performed by tuning the narrow band distributed Bragg reflection mirror portion on the output side from which an output light in TE polarization mode outgoes perpendicularly to the input light. The input signal light and the output signal light are polarized in such a manner that they are perpendicular to one another and, therefore, the device can be realized as a one-directional device. The use of any isolator is not required.
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S. Yamakoshi et al., OFC '88, Optical Fiber Communications Conference, Postdeadline Papers, "An Optical-Wavelength Conversion Laser with Tunable Range of 30 .ANG.", New Orleans, LA., Jan. 25-28, 1988.
K. Sato et al., Conference Digest, 12th IEEE International Semiconductor Laser Conference, Davos, Switzerland, Sep. 9-14, 1990, "TM-Mode Gain Enhancement in InGaAs/InP Lasers with Tensile Strained-Layer Superlattice", p. 48.
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11th IEEE International Semiconductor Laser Conference, Aug. 29, 1988, Boston, MA, U.S., pp. 124-125; K. Kondo et al., A Tunable Optical-Wavelength Conversion Laser with Tm-Polarized Light Input.
IEEE Journal of Quantum ELectronics, vol. 24, No. 11, Nov. 1988, New York, U.S., pp. 2153-2159; H. Kawaguchi et al., Tunable Optical Wavelength Conversion Using an Optically Triggerable Multielectrode Distributed Feedback Laser Diode.
Patent Abstracts of Japan, vol. 14, No. 408 (E-972) Sep. 4, 1970 & JP-A-2 152 289 (Sumitomo Electric Ind. Ltd.).
Ikeda Masahiro
Kurumada Katsuhiko
Mikami Osamu
Naganuma Mitsuru
Uehara Shingo
Gonzalez Frank
Nippon Telegraph & Telephone Corporation
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