Laser
First Claim
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1. A semiconductor laser, comprising:
- a traveling wave laser cavity;
an active section coupled to a waveguide, the active section comprising a forward biased laser gain medium region and a saturatable absorber comprising a reverse biased laser gain medium region;
wherein the forward biased laser gain medium region is between 5 and 20 times longer than the reverse biased laser gain medium region;
a laser output from the active section coupled to the waveguide;
a pulse stretcher embedded m the traveling wave laser cavity; and
a pulse compressor embedded in the traveling wave laser cavity;
wherein, the traveling, wave laser cavity has a direction of propagation the pulse stretcher is coupled to the waveguide after the laser output and before the active section, in the direction of propagation; and
the pulse compressor is coupled to the waveguide after the active section and before the laser output, in the direction of propagation.
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Abstract
A laser includes a traveling wave laser cavity with an active section, a pulse stretcher, and a pulse compressor. The pulse stretcher is coupled to the waveguide before the active section and the pulse compressor is coupled to the waveguide after the active section.
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Citations
19 Claims
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1. A semiconductor laser, comprising:
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a traveling wave laser cavity; an active section coupled to a waveguide, the active section comprising a forward biased laser gain medium region and a saturatable absorber comprising a reverse biased laser gain medium region;
wherein the forward biased laser gain medium region is between 5 and 20 times longer than the reverse biased laser gain medium region;a laser output from the active section coupled to the waveguide; a pulse stretcher embedded m the traveling wave laser cavity; and a pulse compressor embedded in the traveling wave laser cavity; wherein, the traveling, wave laser cavity has a direction of propagation the pulse stretcher is coupled to the waveguide after the laser output and before the active section, in the direction of propagation; and
the pulse compressor is coupled to the waveguide after the active section and before the laser output, in the direction of propagation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical transmitter, comprising:
- a semiconductor laser comprising;
a traveling wave laser cavity having a direction of propagation and comprising a passive silicon waveguide; an active section coupled to the passive silicon waveguide, the active section comprising a forward biased laser gain medium and a saturatable absorber comprising a reverse biased laser gain medium region, wherein the forward biased laser gain medium region is between 5 and 20 times longer than the reverse biased laser gain medium region; a laser output waveguide coupled to the cavity waveguide to output a multi-wavelength laser signal; a pulse stretcher embedded in the passive silicon waveguide after the laser output and before the active section, in the direction of propagation; and
a pulse compressor embedded in the passive silicon waveguide after the active section and before the laser output, in the direction of propagation;a modulator coupled to the laser output to modulate an electrical signal onto a multi-wavelength laser signal; and an optical output to output the modulated multi-wavelength laser signal. - View Dependent Claims (13, 14, 15, 16)
- a semiconductor laser comprising;
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17. A method, comprising:
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propagating a laser pulse within a traveling wave laser cavity comprising a waveguide; stretching the laser pulse in using a pulse stretcher in a time domain to produce a stretched laser pulse having a lower peak power than the laser pulse; amplifying the stretched laser pulse in an active section comprising a laser gain medium and a saturatable absorber of the traveling wave laser cavity, where the laser gain medium between 5 and 20 times longer than the saturatable absorber; compressing the amplified stretched laser pulse in the time domain to produce a compressed laser pulse having a higher peak power than the amplified stretched laser pulse; and outcoupling the compressed laser pulse to produce an output laser pulse. - View Dependent Claims (18, 19)
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Specification