Method and device for performing wavelength modulation with distributed bragg reflector (DBR) laser
First Claim
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1. A method for providing phase modulated current to a semiconductor laser, comprising:
- receiving an a first current into a gain portion of the semiconductor laser;
receiving a second current into a DBR portion of the semiconductor laser, wherein the second current is phase modulated based upon a required wavelength intensity distribution; and
generating an output beam by the semiconductor laser based upon the received first current and the received second current.
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Abstract
The present invention is directed to a method and system for providing phase modulated current to a semiconductor laser to control beam wavelength. A first current is received into a gain portion of the semiconductor laser and a second current is received into a DBR portion of the semiconductor laser. The second current is phase modulated based upon a required intensity value. An output beam is generated by the semiconductor laser based upon the received first current and the received second current.
58 Citations
22 Claims
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1. A method for providing phase modulated current to a semiconductor laser, comprising:
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receiving an a first current into a gain portion of the semiconductor laser;
receiving a second current into a DBR portion of the semiconductor laser, wherein the second current is phase modulated based upon a required wavelength intensity distribution; and
generating an output beam by the semiconductor laser based upon the received first current and the received second current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for providing phase modulated current to a semiconductor laser to control wavelength modulation of a beam generated by the laser, comprising:
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a controller that obtains a required intensity value and converts it to a phase differential value; and
current sources that inject a first current into a gain portion of the semiconductor laser and a second current into a DBR portion of the semiconductor laser, wherein the second current is phase modulated with respect to the first current, based on the phase differential value, wherein the laser generates an output beam having a wavelength modulated based upon a phase differential between the first current and the second current. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for providing phase modulated current to a semiconductor laser to control wavelength modulation of a beam generated by the semiconductor laser, comprising:
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a controller means for obtaining a required intensity value and converts it to a phase differential value; and
current source means for injecting a first current into a gain portion of the semiconductor laser and a second current into a DBR portion of the semiconductor laser, wherein the second current is phase modulated with respect to the first current, based on the phase differential value, the laser generating an output beam having a wavelength modulated based upon the phase differential between the first current and second current. - View Dependent Claims (22)
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Specification