Optical waveguides – Integrated optical circuit
Reexamination Certificate
2005-05-10
2005-05-10
Healy, Brian M. (Department: 2883)
Optical waveguides
Integrated optical circuit
C385S015000, C385S016000, C385S040000, C385S129000, C385S131000, C385S041000, C385S039000
Reexamination Certificate
active
06891986
ABSTRACT:
In an optical switch, a carrier-accumulating layer in which injected carriers are accumulated is provided on a semiconductor substrate having a waveguide formed thereon so that injected effective carriers tend to be accumulated in an effective part, and the burden on a driving circuit is thus reduced to realize high-speed operation. At the same time, when a clad on the carrier injection side, of clad layers formed on both sides of the waveguide, is a second clad layer, and a clad on the substrate side is a first clad layer, a third clad layer is formed on the first clad layer to reduce propagation loss in the waveguide.
REFERENCES:
patent: 4737003 (1988-04-01), Matsumura et al.
patent: 4784451 (1988-11-01), Nakamura et al.
patent: 5107514 (1992-04-01), Goto
patent: 6633692 (2003-10-01), Chua et al.
patent: 4-320219 (1992-11-01), None
patent: 5-249508 (1993-09-01), None
patent: 6-59294 (1994-03-01), None
patent: 6-62450 (1994-03-01), None
patent: 6-130236 (1994-05-01), None
patent: 6-289339 (1994-10-01), None
patent: 8-82810 (1996-03-01), None
“2x2 Optical Waveguide Switch with Bow-Tie Electrode Based on Carrier-Injection Total Internal Reflection in SiGe Alloy,” Baojun Li and Soo-Jin Chua, pp. 206-208, IEEE Photonics Technology Letters, vol. 13, No. 3, Mar. 2001.
Baojun Li, Guozheng Li, Enke Liu, Zuimin Jiang, Chengwen Pei and Xun Wang, Appl. Phys. Lett., pp. 1-3, 75 (1999).
K. Ishida, H. Nakamura, H. Matsumura, T. Kadi, and H. Inoue, Appl. Phys. Lett., pp. 141-142, 50(3), 19 (1987).
Akasaka Yasukazu
Araki Shoujirou
Asano Yoshiyuki
Dobashi Machio
Iio Shinji
Healy Brian M.
Westerman Hattori Daniels & Adrian LLP
Yokogawa Electric Corp.
LandOfFree
Optical switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3439269