Variable wavelength laser device

Patent metadata

Field	Value
Publication number	US-10069277-B2
Application number	US-201515533885-A
Country	US
Kind code	B2
Filing date	Dec 8, 2015
Priority date	Dec 12, 2014
Publication date	Sep 4, 2018
Grant date	Sep 4, 2018

Abstract

The variable wavelength laser device of the present invention includes: an optical amplification means including a low-reflective surface that reflects light of wavelengths other than a predetermined wavelength and emits light of the predetermined wavelength; a wavelength control means for controlling wavelength of light being transmitted through the optical waveguide; a phase control means for controlling phase of light being transmitted through the optical waveguide using heat emitted by a heating means; a reflection means for totally reflecting the inputted light; and a heat dissipation means for restraining transfer of heat emitted by the heating means to regions other than a region in which the phase control means is disposed.

First claim

The invention claimed is:

1. A variable wavelength laser device comprising:
an optical waveguide transmitting light between an optical amplifier and a reflector;
the optical amplifier having a non-reflective surface that inputs and outputs light traveling to and from the reflector and a low-reflective surface that reflects light of a wavelength other than a predetermined wavelength and emits light of the predetermined wavelength,
a wavelength controller that controls wavelength of light being transmitted through the optical waveguide;
a phase controller that controls phase of light being transmitted through the optical waveguide using heat emitted by a heater;
the reflector that returns light coming through the wavelength controller and the phase controller back to the wavelength controller and the phase controller; and
a heat dissipater that restrains transfer of heat emitted by the heater to a region other than a region in which the phase controller is disposed,
wherein the wavelength controller and the phase controller are disposed on a same substrate, and the substrate is disposed above a plate member with a support therebetween, and
wherein the heat dissipater is disposed on the plate member, and the heat dissipater is formed with a height not sufficient for reaching the substrate and is thermally connected to the substrate.

2. The variable wavelength laser device according to claim 1 , wherein the heat dissipater is disposed on the plate member and beneath the heater.

3. The variable wavelength laser device according to claim 1 , wherein the heat dissipater is disposed on the plate member and beneath the wavelength controller.

4. The variable wavelength laser device according to claim 1 , wherein the optical waveguide is folded over within a temperature control space of the heater.

Assignees

• Nec Corp

Inventors

• Kobayashi Naoki

Classifications

• G02F2203/15

  involving resonance effects, e.g. resonantly enhanced interaction · CPC title

• G02F2201/06

  integrated waveguide · CPC title

• H01S3/083

  Ring lasers {(fibre ring lasers H01S3/06791)} · CPC title

• H01S3/106

  by controlling devices placed within the cavity ({H01S3/10076,} H01S3/13 take precedence) · CPC title

• H01S5/02469

  Passive cooling, e.g. where heat is removed by the housing as a whole or by a heat pipe without any active cooling element like a TEC · CPC title