US 7,474,859 B2
Versatile compact transmitter for generation of advanced modulation formats
Daniel Mahgerefteh, Somerville, Mass. (US); Xueyan Zheng, Culver City, Calif. (US); Yasuhiro Matsui, Lawrence, Mass. (US); and Parviz Tayebati, Boston, Mass. (US)
Assigned to Finisar Corporation, Sunnyvale, Calif. (US)
Filed on Apr. 06, 2007, as Appl. No. 11/784,395.
Application 11/784395 is a continuation in part of application No. 11/702436, filed on Feb. 05, 2007.
Application 11/702436 is a continuation in part of application No. 11/441944, filed on May 26, 2006.
Application 11/441944 is a continuation in part of application No. 11/272100, filed on Nov. 08, 2005.
Application 11/272100 is a continuation in part of application No. 11/084630, filed on Mar. 18, 2005.
Application 11/084630 is a continuation in part of application No. 11/084633, filed on Mar. 18, 2005.
Application 11/084633 is a continuation in part of application No. 11/068032, filed on Feb. 28, 2005.
Application 11/068032 is a continuation in part of application No. 10/308522, filed on Dec. 03, 2002.
Claims priority of provisional application 60/853867, filed on Oct. 24, 2006.
Claims priority of provisional application 60/789863, filed on Apr. 06, 2006.
Prior Publication US 2008/0025731 A1, Jan. 31, 2008
Int. Cl. H04B 10/04 (2006.01); H04B 10/155 (2006.01)
U.S. Cl. 398—201  [398/183; 398/189; 398/190; 398/191] 38 Claims
OG exemplary drawing
 
1. A system for generating a return-to-zero differentially-phase-shift-keyed (RZ-DPSK) optical signal comprising:
a driver comprising an N-level digital multilevel transformer (DMT) configured to receive a two level digital electrical signal representing 1s and 0s and output a N-level electrical signal, wherein N>2;
an FM source configured to receive the N-level electrical signal output by the driver and generate an optical frequency modulated signal; and
an optical spectrum reshaper (OSR) configured to receive the optical frequency modulated signal output by the FM source and generate the desired RZ-DPSK optical signal.