Multilane variable bias for an optical modulator
View Patent ↗In an example, the present invention includes an integrated system on chip device. The device has a variable bias block configured with the control block, the variable bias block being configured to selectively tune each of a plurality of laser devices provided on the silicon photonics device to adjust for at least a wavelength of operation, a fabrication tolerance, and an extinction ratio.
1. A device comprising:
a substrate member;
a data input/output interface provided on the substrate member and configured for a predefined data rate and protocol;
an input/output block provided on the substrate member and coupled to the data input/output interface;
a signal processing block provided on the substrate member and coupled to the input/output block;
a driver module provided on the substrate member and coupled to the signal processing block;
a driver interface provided on the substrate member and coupled to the driver module and configured to be coupled to a silicon photonics device comprising a plurality of redundant laser devices in optical communication with an optical channel, the driver interface being configured to transmit output data in either an amplitude modulation format or a combination of phase/amplitude modulation format or a phase modulation format;
a receiver module provided on the substrate member and coupled to the silicon photonics device using an optical loop back signal received from an optical tap coupler, and configured to the signal processing block to communicate information to the input/output block for transmission through the data input/output interface;
a communication block provided on the substrate member and operably coupled to the input/output block, the signal processing block, the driver module, and the receiver module;
a communication interface coupled to the communication block;
a control block provided on the substrate member and coupled to the communication block; and
a variable bias block configured with the control block, the variable bias block being configured to selectively tune each of a plurality of redundant laser devices provided on the silicon photonics device.
2. The device of claim 1 wherein the plurality of redundant laser devices are in optical communication with the optical channel via a switch.
3. The device of claim 1 wherein the plurality of redundant laser devices are in optical communication with the optical channel via a coupler.
4. The device of claim 1 wherein the variable bias block comprises a common voltage rail coupling in parallel with a plurality of voltage drop blocks respectively coupled to the plurality of driver blocks in order to provide variable DC bias as a function of wavelengths of the plurality of redundant laser devices.
5. The device of claim 1 wherein the driver module is selected from a current drive or a voltage driver or a differential driver.
6. The device of claim 1 wherein the amplified modulation format is selected from NRZ format or PAM format.
7. The device of claim 1 wherein the phase modulation format is selected from BPSK or nPSK.
8. The device of claim 1 wherein:
the phase/amplitude modulation is QAM;
the silicon photonic device is configured to convert the output data into an output transport data in a WDM signal; and
the control block is configured to initiate a laser bias or a modulator bias.
9. The device of claim 1 wherein the phase/amplitude modulation is QAM.
10. The device of claim 1 wherein the silicon photonic device is configured to convert the output data into an output transport data in a WDM signal.
11. The device of claim 1 wherein the control block is configured to initiate a laser bias or a modulator bias.
12. The device of claim 1 wherein the control block is configured for laser bias and power control of the silicon photonics device.
13. The device of claim 1 wherein the control block is configured with a thermal tuning or carrier tuning device each of which is configured on the silicon photonics device.
14. The device of claim 1 wherein the input/output block comprises a SerDes block configured to convert N first data streams into M second data streams.
15. The device of claim 1 further comprising a broad band source in optical communication with the receiver module.
16. The device of claim 1 wherein the optical tap coupler is configured to communicate a selected percentage.
17. The device of claim 1 wherein the input/output block further comprises a CDR block, a compensation block, and an equalizer block.
18. The device of claim 1 wherein the variable bias block is configured to selectively tune each of the plurality of redundant laser devices to adjust for a wavelength of operation.
19. The device of claim 1 wherein the variable bias block is configured to selectively tune each of the plurality of redundant laser devices to adjust for a fabrication tolerance.
20. The device of claim 1 wherein the variable bias block is configured to selectively tune each of the plurality of redundant laser devices to adjust for an extinction ratio.