Modulation frequency tunable optical oscillator

Details Modulation frequency tunable optical oscillator Modulation frequency tunable optical oscillator

2008-01-29

2008-01-29

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Optical fiber laser

C372S072000, C372S102000, C372S020000, C372S028000, C372S018000, C285S027000, C285S037000

Reexamination Certificate

active

07324567

ABSTRACT:
Provided is a millimeter-wave band frequency optical oscillator that can be used as an oscillation frequency signal source for a millimeter-wave forwarded to wireless subscribers from a base station of a millimeter-wave wireless subscriber communication system for a next generation (e.g., fifth generation) ultra-high speed wireless internet service. A pair of an optical fiber amplifier and an optical fiber grating mirror is connected to each of input/output ports of a loop mirror in parallel, so that a dual mode laser resonator is formed which can make simultaneous oscillation in two laser modes suitable for each wavelength. Accordingly, it is possible to obtain a light source that is modulated to a ultra-high frequency (over 60 GHz) by a beat phenomenon between the two laser modes.

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Ho-Young Kim, et al.; “Millimeter Frequency Modulated Lasers Usign the Wavelength Dependent Birefringences Inside the Coupled Fiber Cavity”; pp. 125-129.
Hiroaki Sanjih, et al.; “A Precisely Spaced Multiwavelength Light Source with a Pulsed Serrodyne Frequency Shifter in an Optical Ring Circuit”; Tunable and Multiwavelength Lasers 3.3.5.
Y.S. Yun, et al.; “Traveling-wave Electroabsorption Modulator with Enhanced Linearity in Millimeter-wave Band”; Lab of Optoelectronics and Optical Communications, Chung-An University, Korea; pp. 47-50.

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