Apparatus and method for stabilizing wavelength tunable laser
First Claim
1. An apparatus configured to stabilize an output of a laser, the apparatus comprising:
- an optical amplifier configured to oscillate light having a first wavelength band based on a laser modulation signal;
a filter configured to filter the light having the first wavelength band and output light having a second wavelength band narrower than the first wavelength band;
a reference signal generator configured to generate a reference signal by amplifying at least a portion of the light having the second wavelength band; and
a controller configured to minimize a time difference between the laser modulation signal and the reference signal using feedback of the time difference between the laser modulation signal and the reference signal.
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Accused Products
Abstract
An apparatus and method for stabilizing an output of a laser is provided. An optical amplifier oscillates light having a first wavelength band. A filter filters the light having the first wavelength band to output light having a second wavelength band narrower than the first wavelength band. The light having the second wavelength band may correspond to an output of a laser. To stabilize the wavelength center of the output laser, at least a portion of the light having the second wavelength band may be transferred to a fiber Bragg Grating (FBG) through a coupler. By performing feedback of a difference between the signal output from the FBG and a laser modulation signal, an offset corresponding to a lead zirconate titanate (PZT) operating parameter of a Fabry-Perot filter may be controlled to automatically stabilize the wavelength center.
6 Citations
6 Claims
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1. An apparatus configured to stabilize an output of a laser, the apparatus comprising:
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an optical amplifier configured to oscillate light having a first wavelength band based on a laser modulation signal; a filter configured to filter the light having the first wavelength band and output light having a second wavelength band narrower than the first wavelength band; a reference signal generator configured to generate a reference signal by amplifying at least a portion of the light having the second wavelength band; and a controller configured to minimize a time difference between the laser modulation signal and the reference signal using feedback of the time difference between the laser modulation signal and the reference signal. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification