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:
Apr. 08, 2014
Filed:
May. 01, 2009
Ian C. M. Littler, Balmain, AU;
Jong H. Chow, Ainslie, AU;
Malcolm B. Gray, Pennant Hills, AU;
David E. Mcclelland, O'Connor, AU;
Ian C. M. Littler, Balmain, AU;
Jong H. Chow, Ainslie, AU;
Malcolm B. Gray, Pennant Hills, AU;
David E. McClelland, O'Connor, AU;
The Australian National University, Acton, Australian Capital Territory, AU;
Abstract
A system and method for stabilizing a plurality of output frequencies (wavelengths) of a plurality of lasers (). The laser beams are combined using optical multiplexer () and coupled into length-imbalanced (armlength-mismatched) Mach-Zehnder interferometer (MZI) () having an optical modulator (e.g. AOM) () in one of its arms. The output of the MZI is divided into corresponding beams via optical demultiplexer () and each beam is detected by a respective photo-diode (PD) (). The individual electric signals, so generated, are demodulated using a corresponding plurality of phase-responsive devices () and the resulting phase-signals are directed to a plurality of servo-controllers () to control the central frequency of the respective lasers () via a corresponding plurality of feedback loop circuits (). The lasers () can have different central frequencies which can also be individually tunned using offset modules () in the phase-responsive devices ().