Modulator and method of modulating optical carrier with...

Details Modulator and method of modulating optical carrier with... Modulator and method of modulating optical carrier with...

2005-04-19

2005-04-19

Sedighian, M. R. (Department: 2633)

Optical communications

Transmitter

Having particular modulation

C398S183000, C398S186000

Reexamination Certificate

active

06882802

ABSTRACT:
In an optical transmitter which modulates a continuous-wave optical carrier with an electrical data pulse, the carrier is modulated with a clock signal having ½n(where n is an integer equal to or greater than unity) of the frequency of a fundamental sinusoidal component of the data pulse so that the modulated carrier contains at least a center frequency spectral component. On the modulated optical carrier a filtering operation is performed so that the filtered carrier contains a carrier frequency component and first sideband components. Before or after the clock modulation is performed, the data pulse is used to perform data modulation on the optical carrier.

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Y. Miyamoto, et al., “320 Gbit/s (8×40 Gbit/s) WDM Transmission Over 367km with 120km Repeater Spacing Using Carrier-Suppressed Return-To-Zero Format”,Electronics Letters,vol. 35, No. 23, Nov. 11, 1999, pp. 2041-2042.
Yonenaga et al., Electronics Letters, vol. 36, No. 2, pp. 153-155 (2000).
Copy of Japanese Office Action dated Oct. 12, 2004 (and English translation of relevant portion).

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