Acousto-optic tunable filter control apparatus automatically...

Optical: systems and elements – Optical modulator – Light wave temporal modulation

Reexamination Certificate

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Details

C359S305000, C359S308000, C359S290000, C359S298000

Reexamination Certificate

active

07405858

ABSTRACT:
An AOTF control apparatus, which applies an RF signal to an AOTF to allow a selected light to pass through the AOTF, includes: a first calculating unit calculating a relationship between a frequency of the RF signal and a wavelength of the selected light based on a frequency of the RF signal that allows a reference light to pass through the AOTF; and a second calculating unit calculating a relationship between a power of the RF signal and an attenuation amount of the selected light based on an input/output power of the reference signal at the input/output of the AOTF.

REFERENCES:
patent: 6215584 (2001-04-01), Yang et al.
patent: 6643060 (2003-11-01), Hashimoto et al.
patent: 6728026 (2004-04-01), Lee et al.
patent: 7292787 (2007-11-01), Kai et al.
patent: 7349632 (2008-03-01), Noguchi et al.
patent: 2001/0008450 (2001-07-01), Nakazawa
patent: 2004/0190904 (2004-09-01), Noguchi et al.
patent: 2006/0269185 (2006-11-01), Noguchi et al.
patent: 2002-368317 (2002-12-01), None

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