The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 06, 2006
Filed:
Dec. 23, 2003
Raymond R. Chu, Cupertino, CA (US);
Raymond R. Chu, Cupertino, CA (US);
Acceeze, Inc., Santa Clara, CA (US);
Abstract
An optical tunable filter that includes a thin-film filter for band-passing at least two bands of wavelengths. The tunable filter further includes a tunable band-passing device tunable over the at least two bands for tuning to a tunable pass-band spectrally overlapped with one of the at least two bands. The tunable band-passing device further includes an Acousto-optical cell tunable with acoustic wave signals. The thin-film filter cooperating with the tunable band-pass device for generating a tunable output waveform that has substantially a square waveform spectrally corresponding to the at least two bands. The thin-film filter further cooperates with the tunable band-pass device for generating a tunable output waveform having substantially a square waveform over a spectral range of a C-band, an L-band and an S-band. The tunable band-pass device band-passes a tunable substantially Sinc-function-like waveform and the thin film filter band-passing a substantially square waveform with a center attenuated dip for compensating the tunable substantially Sinc-function waveform.