Multi-wavelength distributed feedback laser
In one embodiment, a distributed feedback laser includes a laser comprising a waveguide, the waveguide having a variable width from a first end to a second end, the laser to generate optical energy of a plurality of lasing wavelengths. Other embodiments are described and claimed.
1. An apparatus, comprising:
a laser comprising a waveguide, the waveguide having a variable width from a first end to a second end, the laser to generate optical energy of a plurality of lasing wavelengths;
a plurality of modulators, each of the plurality of modulators to modulate one of the plurality of lasing wavelengths with data; and
a semiconductor optical amplifier coupled to the plurality of modulators to amplify the modulated plurality of lasing wavelengths.
2. The apparatus of claim 1 , wherein the waveguide comprises a grating pattern, the grating pattern comprising a plurality of phase shift locations, each of the plurality of phase shift locations corresponding to one of the plurality of lasing wavelengths.
3. The apparatus of claim 2 , wherein the grating pattern comprises a constant grating pitch.
4. The apparatus of claim 2 , wherein the variable width is to cause the waveguide to have a variable effective refractive index to effect the plurality of lasing wavelengths.
5. The apparatus of claim 1 , wherein the variable width comprises a linearly tapered width from the first end to the second end.
6. The apparatus of claim 1 , further comprising a plurality of electrodes adjacent a first side of the waveguide, wherein each of the plurality of electrodes is to be independently controlled.
7. The apparatus of claim 6 , further comprising a control circuit, wherein the control circuit is to cause an independent voltage to be provided to each of the plurality of electrodes.
8. The apparatus of claim 1 , wherein the waveguide comprises:
a first portion having a first grating reflector and a second grating reflector, wherein the first grating reflector has a first center wavelength and the second grating reflector has a second center wavelength different than the first center wavelength; and
a second portion having the second grating reflector and a third grating reflector, wherein the third grating reflector has a third center wavelength different than the second center wavelength.
9. The apparatus of claim 8 , wherein the first grating reflector overlaps with at least a portion of the second grating reflector.
10. A system, comprising:
a first integrated circuit comprising at least one processor;
a second integrated circuit; and
a silicon photonic integrated circuit to couple the first integrated circuit and the second integrated circuit, the silicon photonic integrated circuit having a distributed feedback (DFB) laser comprising:
a laser comprising a waveguide having a variable width from a first end to a second end, the laser to generate optical energy of a plurality of lasing wavelengths.
11. The system of claim 10 , wherein the silicon photonic integrated circuit further comprises:
a plurality of modulators, each of the plurality of modulators to modulate one of the plurality of lasing wavelengths with data to form modulated optical data; and
a semiconductor optical amplifier coupled to the plurality of modulators to amplify the modulated optical data.
12. The system of claim 10 , further comprising a motherboard on which the first integrated circuit, the second integrated circuit, and the silicon photonic integrated circuit are adapted.
13. The system of claim 10 , wherein the waveguide comprises a grating pattern having a constant grating pitch, the grating pattern comprising a plurality of phase shift locations, each of the plurality of phase shift locations corresponding to one of the plurality of lasing wavelengths.
14. The system of claim 13 , further comprising a plurality of electrodes adjacent a first side of the waveguide, wherein each of the plurality of electrodes is to receive an independent control voltage.
15. The system of claim 13 , wherein the grating pattern comprises:
a first portion adjacent a first side of a first phase shift location, the first portion comprising a first grating reflector for a first lasing wavelength and having a first center wavelength; and
a second portion adjacent a second side of the first phase shift location, the second portion comprising a second grating reflector for the first lasing wavelength and having a second center wavelength different than the first center wavelength.
16. An apparatus, comprising:
a laser comprising a waveguide, the waveguide having a variable width from a first end to a second end, the laser to generate optical energy of a plurality of lasing wavelengths, wherein the waveguide comprises:
a first portion having a first grating reflector and a second grating reflector, wherein the first grating reflector has a first center wavelength and the second grating reflector has a second center wavelength different than the first center wavelength; and
a second portion having the second grating reflector and a third grating reflector, wherein the third grating reflector has a third center wavelength different than the second center wavelength.
17. The apparatus of claim 16 , wherein the waveguide comprises a grating pattern comprising a constant grating pitch.
18. The apparatus of claim 16 , wherein the variable width comprises a linearly tapered width from the first end to the second end.
19. The apparatus of claim 16 , further comprising a plurality of electrodes adjacent a first side of the waveguide, wherein each of the plurality of electrodes is to be independently controlled.
20. The apparatus of claim 19 , further comprising a control circuit, wherein the control circuit is to cause an independent voltage to be provided to each of the plurality of electrodes.