Compact laser source

Patent metadata

Field	Value
Publication number	US-9590385-B2
Application number	US-201313945537-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Jul 18, 2012
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

Embodiments of the present invention are directed toward a low-power, high quality compact laser source. Embodiments include an optical combiner combining the outputs of a pump laser and a Fabry-Perot seed laser into a fiber amplifier. The fiber amplifier can comprise, for example, erbium-doped fiber. Embodiments can include pulsed and continuous wave lasers, depending on desired functionality.

First claim

What is claimed is:

1. A device comprising:
a rangefinder unit having a body that houses:
a seed laser comprising a Fabry-Perot laser diode;
a pump laser;
an optical fiber amplifier; and
an optical combiner coupled with the seed laser, the pump laser, and the optical fiber amplifier, the optical combiner configured to combine an output of the seed laser and an output of the pump laser into the optical fiber amplifier; and

an aperture coupled to the body and configured to form an output beam from an output of the optical fiber amplifier;
wherein a gain of the optical fiber amplifier is a function of a wavelength of an input signal of the optical fiber amplifier, and wherein the optical fiber amplifier is configured to create four-wave mixing peaks in a gain spectrum of the optical fiber amplifier, the gain spectrum relating the gain of the optical fiber amplifier to the wavelength of the input signal of the optical fiber amplifier.

2. The device as recited in claim 1 , wherein a diameter of the aperture is between 10-15 mm.

3. The device as recited in claim 1 , wherein the optical fiber amplifier comprises erbium-doped optical fiber.

4. The device as recited in claim 3 , wherein the erbium-doped optical fiber comprises single-mode fiber.

5. The device as recited in claim 1 , wherein the laser rangefinder unit is configured to generate the output beam as a pulse of between 10-50 ns in duration.

6. The device as recited in claim 5 , wherein an output power corresponding to the pulse is between 500-700 W.

7. The device as recited in claim 5 , wherein the laser rangefinder unit is configured to generate a plurality of pulses having a duty cycle of 100-200 to 1.

8. The device as recited in claim 1 , wherein the laser rangefinder unit is configured to generate the output beam as a continuous wavelength.

9. The device as recited in claim 8 , wherein an output power corresponding to the output beam is between 0.75-1.25 W.

10. The device as recited in claim 1 , wherein the pump laser outputs light with a wavelength of 940 nm.

11. A laser source comprising:
a seed laser comprising a Fabry-Perot laser diode;
a pump laser;
an optical fiber amplifier; and
an optical combiner coupled with the seed laser, the pump laser, and the optical fiber amplifier, the optical combiner configured to combine an output of the seed laser and an output of the pump laser into the optical fiber amplifier,
wherein the seed laser, pump laser, optical fiber amplifier, and optical combiner are configured to enable the laser source to be housed in a rangefinder unit;
wherein a gain of the optical fiber amplifier is a function of a wavelength of an input signal of the optical fiber amplifier, and wherein the optical fiber amplifier is configured to create four-wave mixing peaks in a gain spectrum of the optical fiber amplifier, the gain spectrum relating the gain of the optical fiber amplifier to the wavelength of the input signal of the optical fiber amplifier.

12. The laser source as recited in claim 11 , further comprising one or more packages configured to house at least one of, the seed laser, the pump laser, or the optical combiner.

13. The laser source as recited in claim 12 , wherein the one or more packages comprise at least one of a butterfly package or a high heat load (HHL) package.

14. The laser source as recited in claim 11 , wherein the optical fiber amplifier comprises erbium-doped optical fiber.

15. The laser source as recited in claim 11 , wherein the laser source is configured to generate an output beam as a pulse of between 10-50 ns in duration.

16. The laser source as recited in claim 15 , wherein an output power corresponding to the pulse is between 500-700 W.

17. The laser source as recited in claim 15 , wherein the laser source is configured to generate a plurality of pulses having a duty cycle of 100-200 to 1.

18. The laser source as recited in claim 11 , wherein the laser source is configured to generate an output beam as a continuous wavelength.

19. The laser source as recited in claim 18 , wherein an output power corresponding to the output beam is between 0.75-1.25 W.

20. The laser source as recited in claim 11 , wherein the pump laser outputs light with a wavelength of 940 nm.

Assignees

• Cubic Corp

Inventors

• Maryfield Tony
• Hariharan Anand
• Robinson David

Classifications

• H01S3/094003 Primary

  the pumped medium being a fibre · CPC title

• G01S17/32

  using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated · CPC title

• H01S3/06754

  Fibre amplifiers (H01S3/06708 takes precedence) · CPC title

• H01S3/0941

  of a laser diode · CPC title

• H01S3/06716

  Fibre compositions (per se C03C13/04)or doping with active elements (lasing materials in general H01S3/14) · CPC title