Optical: systems and elements – Optical frequency converter
Reexamination Certificate
2005-02-15
2005-02-15
Lee, John D. (Department: 2874)
Optical: systems and elements
Optical frequency converter
Reexamination Certificate
active
06856450
ABSTRACT:
An optical comb generator includes frequency-shifting elements of a particular type that we refer to as a “frequency mirror.” A frequency mirror mixes input light at a signal frequency and a reference frequency to produce output light at a third frequency that lies in contraposition to the signal frequency relative to the reference frequency. The comb generator includes at least two frequency mirrors, having respective reference frequencies F1and F2. At least some of the power of a light beam is shifted by the first frequency mirror from an input frequency to a frequency that lies in contraposition thereto relative to F1, and then light at the shifted frequency is shifted to yet a new frequency by the second frequency mirror. The resulting twice-shifted frequency lies in contraposition to the once-shifted frequency, relative to F2. The result is that a difference of 2(F2−F1) separates the twice-shifted frequency from the input frequency. This process is repeatable to generate a comb of equally spaced, shifted frequencies. In specific embodiments of the invention, the frequency mirror is a periodically poled lithium niobate (PPLN) device pumped by laser radiation at the pertinent reference frequency.
REFERENCES:
patent: 3619637 (1971-11-01), Goto
patent: 3644845 (1972-02-01), Harris
patent: 3962576 (1976-06-01), Kuhl et al.
patent: 4272694 (1981-06-01), Jacobs
patent: 4346314 (1982-08-01), Craxton
patent: 4633103 (1986-12-01), Hyman et al.
patent: 4884277 (1989-11-01), Anthon et al.
patent: 5033051 (1991-07-01), Werner
patent: 5047668 (1991-09-01), Bosenberg
patent: 5101291 (1992-03-01), Jopson
patent: 5117126 (1992-05-01), Geiger
patent: 5734493 (1998-03-01), Jopson
patent: 5825517 (1998-10-01), Antoniades et al.
patent: 5946129 (1999-08-01), Xu et al.
patent: 6456424 (2002-09-01), Arbore et al.
patent: 20010036208 (2001-11-01), Zhou et al.
patent: 20020141457 (2002-10-01), Adams
Osamu Tadanaga, et al., “A 1-THz Optical Frequency Shifter Using Quasi-Phase-Matched LiNb 03 Wavelength Converters, ” Digest OFC 2002, pp. 592-593, 2002.
Chowdhury Aref
Jopson Robert Meachem
Finston M. I.
Lee John D.
Lucent Technologies - Inc.
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