Delay demodulation devices

Details Delay demodulation devices Delay demodulation devices

2011-06-14

2011-06-14

Kim, Ellen (Department: 2874)

Optical waveguides

Integrated optical circuit

C359S325000

Reexamination Certificate

active

07961991

ABSTRACT:
The delay demodulation device1comprises an input waveguide2which receives DQPSK signals; a Y-branch waveguide3which splits the light waveguide2; a first Mach-Zehnder interferometer (MZI)4; and a second Mach-Zehnder interferometer5. Both ends of the arm-waveguides8, 9of the MZI4and the both ends of the arm-waveguides12, 13of the MZI5are bent toward the center portion of the planar lightwave circuit (PLC)1A. Thereby, the length of the arm-waveguides8, 9of the MZI4and the length of the arm-waveguides of the MZI5are shortened in the Z-direction. And, the length of the input couplers6, 10and the output couplers7, 11of the MZIs4, 5are shortened in the Z-direction. Therefore, the area covered by the MZIs4, 5can be made smaller.

REFERENCES:
patent: 6961492 (2005-11-01), Doerr
patent: 7259901 (2007-08-01), Parsons et al.
patent: 2007/0177151 (2007-08-01), Isomura et al.
patent: 2010/0073760 (2010-03-01), Hasegawa et al.
patent: 2007-60442 (2007-03-01), None
patent: 2007-151026 (2007-06-01), None
U.S. Appl. No. 12/415,407, filed Mar. 31, 2009, Hasegawa, et al.

Affiliated with

Also associated with

Rating

Delay demodulation devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2649395