Photonic encoder

Details Photonic encoder Photonic encoder

2011-04-12

2011-04-12

Tran, Dzung D (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S186000, C398S188000

Reexamination Certificate

active

07925169

ABSTRACT:
A modulator arrangement for modulating an optical signal using a differential quadrature phase shift key for use in an optical wavelength division multiplex (WDM) optical communications system comprising a laser for producing an optical signal of a selected wavelength, which signal is split by a splitter (4), each part of said split signal being applied to a respective phase modulator (6, 8). The phase modulators (6, 8) are adapted to modulate the phase of the signal in dependence on a respective drive voltage and the phase of the output of at least one modulator is shiftable. The split signals are recombined by an optical recombiner (12) to form an optical phase shift key output. The arrangement further comprises a phase modulator (20) adapted to chirp the optical phase shift key output.

REFERENCES:
patent: 4847477 (1989-07-01), Smith
patent: 4893352 (1990-01-01), Welford
patent: 5222103 (1993-06-01), Gross
patent: 5907421 (1999-05-01), Warren et al.
patent: 6341023 (2002-01-01), Puc
patent: 6407845 (2002-06-01), Nakamoto
patent: 6407846 (2002-06-01), Myers et al.
patent: 6421155 (2002-07-01), Yano
patent: 6628849 (2003-09-01), Yap et al.
patent: 2002/0196508 (2002-12-01), Wei et al.
patent: 2004/0028418 (2004-02-01), Kaplan et al.
patent: 0 748 069 (1996-12-01), None
patent: 0 938 197 (1999-08-01), None
patent: 2 361 071 (2001-10-01), None
patent: 2 364 790 (2002-02-01), None
patent: 2 370 473 (2002-06-01), None
patent: WO-01/08336 (2001-02-01), None
Djupsjoebacka, Anders, “Residulal Chirp in Integrated-Optic Modulators,” IEEE Photonics Technology Letters, vol. 4 (1):41-43 (1992).
Kodama Y. et al.: “Analytical theory of guiding-center nonreturn-to-zero and return-to-zero signal transmission in normally dispersive nonlinear optical fibers”; Optics Letters, Optical Society of America, Washington, US, vol. 20, No. 22, Nov. 15, 1995, pp. 2291-2293, XP002230089 abstract p. 2292, paragraph 2-p. 2293, paragraph 1.
Murakami M. et al.: “Transoceanic twelve 10 Gbit/s WDM signal transmission experiment with individual channel dispersion-and-gain compensation and prechirped RZ pulse format”; Electronics Letters, IEE Stevenage, GB, vol. 33, No. 25, Dec. 4, 1997, pp. 2145-2146, XP006008255, ISSN: 0013-5194 abstract p. 2145, paragraph 3, figure 1.

Affiliated with

Also associated with

Rating

Photonic encoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photonic encoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photonic encoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2730177