High energy fiber laser modulator

Patent metadata

Field	Value
Publication number	US-8970935-B2
Application number	US-201213628454-A
Country	US
Kind code	B2
Filing date	Sep 27, 2012
Priority date	Sep 27, 2012
Publication date	Mar 3, 2015
Grant date	Mar 3, 2015

Abstract

A laser device includes a seed laser, a polarizer, a pseudorandom bit sequence (PRBS) pattern generator, and a phase modulator. The polarizer may be optically coupled to receive an output of the seed laser and may generate a polarization filtered output. The PRBS pattern generator may be configured to generate a PRBS pattern. The phase modulator may be configured to apply a PRBS modulation scheme to the polarization filtered output based on the PRBS pattern. The PRBS pattern may be generated to have a length above a first threshold for avoiding an occurrence of backward propagation being in phase with forward propagation in an active fiber receiving an output of the phase modulator when the pattern repeats and below a second threshold for phase mismatch in the active fiber.

First claim

What is claimed is:

1. A laser device comprising:
a seed laser;
a polarizer optically coupled to receive an output of the seed laser and generate a polarization filtered output;
a pseudorandom bit sequence (PRBS) pattern generator configured to generate a PRBS pattern; and
a phase modulator configured to apply a PRBS modulation scheme to the polarization filtered output based on the PRBS pattern,
wherein the PRBS pattern is generated to have a length above a first threshol…

Assignees

• Univ Johns Hopkins

Inventors

• Dennis Michael L
• Torruellas William E
• Brown David M

Classifications

• H01S3/10061 Primary

  Electricity · mapped topic

• H01S3/06754

  Electricity · mapped topic

• H01S3/10053

  Electricity · mapped topic

• H01S3/10084

  Electricity · mapped topic

• H01S2301/03

  Electricity · mapped topic