Semiconductor laser with low relative intensity noise of individual longitudinal modes and optical transmission system incorporating the laser

Patent No. 8,411,711

Issued: April 2, 2013
Filed: December 3, 2009
Term Extension: 321 days

Inventors: Gubenko; Alexey (Dortmund, DE), Kovsh; Alexey (Dortmund, DE), Wojcik; Greg (Santa Clara, CA), Livshits; Daniil (Dortmund, DE), Krestnikov; Igor (Dortmund, DE), Mikhrin; Sergey (Dortmund, DE)
Assignee: Innolume GmbH (Dortmund, Germany)


A semiconductor laser comprises an electrically isolated active section and at least one noise reducing section and operates on a ground state transition of a quantum dot array having inhomogeneous broadening greater than 10 nm. The laser preferably emits more than 10 optical modes such that a total relative intensity noise of each optical mode is less than 0.2% in the 0.001 GHz to 10 GHz range. The spectral power density is preferably higher than 2 mW/nm. An optical transmission system and a method of operating a quantum dot laser with low relative intensity noise of each optical mode are also disclosed

Reference to Related Applications

This application claims one or more inventions which were disclosed in Provisional Application No. 61/119,414, filed Dec. 3, 2008, entitled "SEMICONDUCTOR LASER WITH LOW RELATIVE INTENSITY NOISE OF INDIVIDUAL LONGITUDINAL MODES". The benefit under 35 USC 119(e) of the U.S. provisional application is hereby claimed, and the aforementioned application is hereby incorporated herein by reference.

This application is also a continuation-in-part of co-pending patent application Ser. No. 11/938,472, filed Nov. 12, 2007, entitled "OPTICAL TRANSMISSION SYSTEM, which claims one or more inventions which were disclosed in Provisional Application No. 60/867,952, filed Nov. 30, 2006, entitled "OPTICAL TRANSMISSION SYSTEM", and is a continuation-in-part of patent application Ser. No. 11/295,943, filed Dec. 7, 2005, entitled "LASER SOURCE WITH BROADBAND SPECTRUM EMISSION", now U.S. Pat. No. 7,561,607, issued Jul. 14, 2009, and patent application Ser. No. 11/737,946, filed Apr. 20, 2007, entitled "LASER SOURCE WITH BROADBAND SPECTRUM EMISSION", now U.S. Pat. No. 7,555,027, issued Jun. 30, 2009, which claims one or more inventions which were disclosed in Provisional Application No. 60/745,641, filed Apr. 26, 2006, entitled "LASER SOURCE WITH BROADBAND SPECTRUM EMISSION" and Provisional Application No. 60/863,443, filed Oct. 30, 2006, entitled "LASER SOURCE WITH BROADBAND SPECTRUM EMISSION". The aforementioned applications are hereby incorporated herein by reference.


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