OPTICAL DEVICE, WAVELENGTH SELECTION FILTER AND TEMPERATURE CONTROL METHOD USED THEREFOR

Title:

OPTICAL DEVICE, WAVELENGTH SELECTION FILTER AND TEMPERATURE CONTROL METHOD USED THEREFOR

Document Type and Number:

Japanese Patent JPH10221661

Kind Code:

A

Abstract:

To provide an optical device and a wavelength selection filter capable of realizing a negative feedback control having a high speed responsiveness whose time delay in the responsiveness of the temp. control of a Fabry-perot etalon type resonator is eliminated and a high control accuracy, and to provide a temp. control method used therefor.

This device is provided with a temp. control means 40 for executing a constant current control supplying a constant current to a heating electrode having a prescribed negative temp. characteristic or positive temp. characteristic with respect to a temp. change and also continuing a negative feedback temp. control to apply a constant current for holding the operating temp. of an etalon medium 208 to the heating electrode based on a negative feedback function using the electric resistance value of the heating electrode and the negative temp. characteristic or the positive temp. characteristic at the time of a power supply.

Inventors:

YAGO SHIGEO
KUDOU TAKEMICHI
WATANABE YOSHIHIKO
HASEGAWA YASUTAKA
KUROKAWA TAKASHI
YOSHIZAWA TETSUO

Application Number:

JP2085397A

Publication Date:

August 21, 1998

Filing Date:

February 03, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

YAZAKI CORP
NIPPON TELEGRAPH & TELEPHONE

International Classes:

G01J3/26; G02F1/01; G02F1/13; G02F1/23; (IPC1-7): G02F1/01; G01J3/26; G02F1/13; G02F1/23

Attorney, Agent or Firm:

Hideo Takino (1 outside)

Previous Patent: WAVELENGTH SELECTION FILTER AND RESONANCE WAVELENGTH SELECTION CONTROL METHOD USED FOR THE FILTER

Next Patent: QUANTITATIVE WELL STRUCTURE OPTICAL MODULATOR