Optical: systems and elements – Optical amplifier – Multiple pass
Reexamination Certificate
2007-01-24
2009-10-13
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Multiple pass
C359S341100, C372S006000
Reexamination Certificate
active
07602546
ABSTRACT:
To extend the temperature range for a stable operation without mode hopping and obtain a stable laser oscillation, a laser oscillator is provided. The laser oscillator includes: an optical circulator in which light incident on a first port is exited from the second port, light incident on the second port is exited from a third port, and light incident on a fourth port is exited from the first port; a first optical amplification fiber that amplifies the light exited from the third port because of being excited by an exciting light and injects the same into the first port; a reflective optical filter that reflects light with a predetermined wavelength among the light exited from the second port and injects the same into the second port again; and an pump light source that generates an exciting light to excite the first optical amplification fiber. The reflective optical filter transmits light oscillated by laser in a ring resonator including the first optical amplification fiber, the optical circulator and the reflective optical filter and outputs the same. The pump light source injects the exciting light from the fourth port into a ring resonator.
REFERENCES:
patent: 6185230 (2001-02-01), Waarts
patent: 6570893 (2003-05-01), Libatique et al.
patent: 6845108 (2005-01-01), Liu et al.
patent: 2002/0154661 (2002-10-01), Hoose et al.
patent: 2002/0176451 (2002-11-01), Lee et al.
patent: 2006/0193352 (2006-08-01), Chong et al.
patent: 9-64440 (1997-03-01), None
patent: 2006080384 (2006-03-01), None
Patent Abstracts of Japan, Publication No. 09-064440, Publication Date: Mar. 7, 1997, 2 pages.
Masuda Shin
Nakazawa Masataka
Shiota Kazunori
Yoshida Masato
Advantest Corporation
Bolda Eric
National University Corporation Tohoku University
Osha • Liang LLP
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