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Method and Apparatus for Controlling the Polarization of an Optical Signal

Summary

A method of controlling the state of polarization of an optical signal includes injecting the optical signal into a laser diode and matching the wavelength of the optical signal to a longitudinal mode of the laser diode. A stabilizer signal can also be injected in to the laser diode. The wavelength of the stabilizer signal is matched a first longitudinal mode of the laser diode a longitudinal mode of the laser diode to the optical signal.

Supplementary Information

Patent Number: US7177330B2
Application Number: US2003388598A
Inventor: Wai, Ping kong Alexander | Tam, Hwa Yaw | Chan, Lai Yin Simon | Chung, Weng Hong
Priority Date: 17 Mar 2003
Priority Number: US7177330B2
Application Date: 17 Mar 2003
Publication Date: 13 Feb 2007
IPC Current: H01S0003098 | G02F000101 | H01S000310
US Class: 372027 | 372018 | 372019
Assignee Applicant: The Hong Kong Polytechnic University
Title: Method and apparatus for controlling the polarization of an optical signal
Usefulness: Method and apparatus for controlling the polarization of an optical signal
Summary: For controlling polarization state of return-to-zero optical signal and non-return-to-zero optical signal in optical switch, wavelength converter, add-drop multiplexer, polarization multiplexed system and coherent detection system in optical network of dense wavelength division multiplexing (DWDM) system.
Novelty: Optical signal polarization state control method in dense wavelength division multiplexing system, involves injecting optical signal with wavelength matching longitudinal mode of Fabry-perot laser diode, into laser diode

Industry

Automotive

Sub Group

Engine/Motor

Application Date

17.03.2003

Application No.

10/388,598

Patent Information

US7,177,330B2

Others

WAI P.K.A.

ID No.

IP-052

Country/Region

USA

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