Optical output controller and its control method

Details Optical output controller and its control method Optical output controller and its control method

2008-03-10

2010-12-21

Sanghavi, Hemang (Department: 2874)

Optical: systems and elements

Optical frequency converter

C359S328000, C372S022000, C372S034000

Reexamination Certificate

active

07855830

ABSTRACT:
An optical output controller includes a wavelength conversion device operable to change the wavelength of pumped laser light; a heating/cooling unit operable to control the temperature of the wavelength conversion device; a temperature detector which detects the temperature of the wavelength conversion device; a temperature controller operable to control the heating/cooling unit such that the detected temperature corresponds to a target temperature; an optical output detector operable to detect the optical output from the wavelength conversion device; an optical-output maximization controller operable to determine a temperature at which the optical output is maximized according to the optical output detected by the optical output detector and from the detected temperature detected by the temperature detector and, further, outputs the temperature difference between the determined temperature and the detected temperature; and an adder which adds the temperature difference outputted from the optical-output maximization controller to the target temperature; wherein the temperature difference is added to the target temperature to correct the target temperature for maximizing the optical output.

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International Search Report issued Apr. 8, 2008 in International (PCT) Application No. PCT/JP2008/000500.
International Preliminary Report on Patentability issued Oct. 1, 2009 in International (PCT) Application No. PCT/JP2008/000500.

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