Coherent light generators – Particular beam control device – Optical output stabilization
Reexamination Certificate
2005-03-01
2005-03-01
Leung, Quyen (Department: 2828)
Coherent light generators
Particular beam control device
Optical output stabilization
Reexamination Certificate
active
06862303
ABSTRACT:
Disclosed is a multiwavelength locking method and apparatus using an acousto-optic tunable filter in an optical communication system including optical transport networks, in which output wavelengths of light sources are monitored under the condition in which pilot signals are applied to the acousto-optic tunable filter, so as to lock the wavelengths of the light sources, thereby eliminating an wavelength instability of the light sources for an improvement in transmission characteristics. The acousto-optic tunable filter receives light beams of N different frequencies respectively outputted from N light sources, along with N pilot signals having different frequencies, and converts respective frequencies of beam components of the output beam corresponding to the N pilot signals, thereby outputting N frequency-converted output beams to be applied to a photo-detector. N electrical signals respectively corresponding to the frequencies of the pilot signals are outputted from the photo-detector, separated from one another while corresponding to the light sources, respectively, and then used to compensate for respective output wavelengths of the light sources, thereby enabling the corresponding light sources to output locked wavelengths, respectively.
REFERENCES:
patent: 5208819 (1993-05-01), Huber
patent: 5825792 (1998-10-01), Villeneuve et al.
patent: 6094446 (2000-07-01), Tei et al.
patent: 6118562 (2000-09-01), Lee et al.
patent: 6233262 (2001-05-01), Mesh et al.
patent: 6240109 (2001-05-01), Shieh
patent: 6291813 (2001-09-01), Ackerman et al.
patent: 6548806 (2003-04-01), Chung et al.
patent: 6643060 (2003-11-01), Hashimoto et al.
Optics Letters, Jan. 1, 1996, vol. 21, No. 1, “All-fiber tunable filter and laser based on two-mode fiber,” pp. 27-29 Yun,S et al.
Optics Letters, Jun. 1986, vol. 11, No. 6, pp. 389-391 Kim et al “All-fiber Acousto-optic FrequencyShifter” Jun. 1986.
Kim Bong Kyu
Kim Byoung-Sung
Kim Hae Geun
Kim Kwang Joon
Blakely & Sokoloff, Taylor & Zafman
Electronics & Telecommunications Research Institute
Leung Quyen
LandOfFree
Multiwavelength locking method and apparatus using... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiwavelength locking method and apparatus using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiwavelength locking method and apparatus using... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3419737