Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2007-02-06
2007-02-06
Wood, Kevin S. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S039000
Reexamination Certificate
active
10883955
ABSTRACT:
A light source has a structure in which a 3-dB beam splitter is integrated with a Febry-Perot laser diode having a cleaved plane. A first waveguide grating and a first refractive index modifier changing a Bragg wavelength of the first waveguide grating are provided at one branch of the 3-dB beam splitter. A second waveguide grating and a second refractive index modifier changing a Bragg wavelength of the second waveguide grating are provided at another branch of the 3-dB beam splitter.
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Y. Matsui, M.D., et al, “Beat frequency generation up to 3.4THz from simultaneous two-mode lasing operation of sampled-grating DBR laser”, Electronics Letters, Mar. 18, 1999, vol. 35, No. 6, pp. 472-474.
S. Iio, et al., “Two-Longitudinal-Mode Laser Diodes” IEEE Electronics Technology Letters, vol. 7, No. 9, Sep. 1995, pp. 959-961.
S. D Roh, et al., “Single and Tunable Dual-Wavelength Operation of an InGaAs-GaAs Ridge Waveguide Distributed Bragg Reflector Laser”, IEEE Transactions on Photonics Letters, vol. 12, No. 1, Jan. 2000, p. 16-18.
Kim Dong Churl
Leem Young Ahn
Park Kyung Hyun
Yee Dae Su
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