Apparatus for extracting an optical clock and apparatus for demu

Optical: systems and elements – Deflection using a moving element – Using a periodically moving element

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

359187, 359194, H04J 1408

Patent

active

054575591

ABSTRACT:
A signal light and a clock light which is generated by a clock light generator are propagated through a non-linear optical medium of, for instance, a silica based single mode optical fiber, from which the signal and clock lights and a four-wave mixing light are obtained. One light, for instance, the four-wave mixing light is extracted from the output lights of the non-linear optical medium, and a control signal which is dependent on a time-mean value in power of the extracted light is applied to a voltage controlled oscillator (VCO) for driving the clock light generator. Thus, a clock light which is locked in phase to the signal light is obtained. In case where the signal light comprises N time-division sequential lights (N=1, 2, 3, - - -), and a clock frequency of the clock light is 1/N of a clock frequency of the signal light, each one of the N time-division seaquential lights is shifted in phase or frequency by the non-linear optical medium, so that the phase or frequency shifted sequential light is switched to be demultiplexed by a switch device such as an optical coupler and a polarization beam splitter.

REFERENCES:
patent: 4980891 (1990-12-01), Izadpanah
patent: 5339185 (1994-08-01), Kaede
Shuppan, Sanpo, The Technology for PCM Communication, (Aug., 1976), pp. 84-89, 106-109.
Kawanishi, S. and Saruwatari, M., Electronics Letters, "10GH.sub.z Timing Extraction From Randomly Modulated Optical Pulses Using Phase-Locked Loop with Travelling-Wave Laser-Diode Optical Amplifier Using Optical Gain Modulation", vol. 28. No. 5 (Feb. 27, 1992), pp. 510-511.
Electronics Letters, "16 Gbit/s All-Optical Demultiplexing Using Four-Wave Mixing", vol. 27, No. 11 (May 23, 1991), pp. 922-924.
Electronics Letters, "Demonstration of the Nonlinear Fibre Loop Mirror As an Ultrafast All-Optical Demultiplexer", vol. 26, No. 14 (Jul. 5, 1990), pp. 962-964.
Morioka, Toshio and Saruwatari, Masatoshi, IEEE Journal on Selected Areas in Communications, "Ultrafast All-Optical Switching Utilizing the Optical Kerr Effect in Polarization-Maintaining Single-Mode Fibers", vol. 6, No. 7 (Aug., 1988), pp. 1186-1198.
Electronics Letters, "Demonstration of the Optical Kerr Effect in an All-Fibre Mach-Zehnder Interferometer at Laser Diode Powers", vol. 24, No. 6 (Mar. 17, 1988), pp. 340-341.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for extracting an optical clock and apparatus for demu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for extracting an optical clock and apparatus for demu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for extracting an optical clock and apparatus for demu will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2314299

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.