Method and system for a distributed optoelectronic receiver
View Patent ↗Methods and systems for a distributed optoelectronic receiver are disclosed and may include an optoelectronic receiver having a grating coupler, a splitter, a plurality of photodiodes, and a plurality of transimpedance amplifiers (TIAs). The receiver receives a modulated optical signal utilizing the grating coupler, splits the received signal into a plurality of optical signals, generates a plurality of electrical signals from the plurality of optical signals utilizing the plurality of photodiodes, communicates the plurality of electrical signals to the plurality of TIAs, amplifies the plurality of electrical signals utilizing the plurality of TIAs, and generates an output electrical signal from coupled outputs of the plurality of TIAs. Each TIA may be configured to amplify signals in a different frequency range. One of the plurality of electrical signals may be DC coupled to a low frequency TIA of the plurality of TIAs.
1. A method for communication, the method comprising:
in an optoelectronic receiver comprising a grating coupler, splitters, photodiodes, a processor, and transimpedance amplifiers (TIAs):
receiving a modulated optical signal utilizing the grating coupler;
splitting the received signal into a plurality of optical signals using the splitters;
generating a plurality of electrical signals from the plurality of optical signals utilizing the photodiodes;
amplifying the plurality of electrical signals utilizing the TIAs, wherein each TIA is configured to amplify signals in a different frequency range; and
discriminating, utilizing the processor, optical frequencies of the received signal based on magnitudes of output signals from each of the TIAs.
2. The method according to claim 1 , comprising DC coupling one of the plurality of electrical signals to a low frequency TIA of the TIAs.
3. The method according to claim 1 , comprising AC coupling one of the plurality of electrical signals to a high frequency TIA of the TIAs.
4. The method according to claim 1 , wherein the TIAs each have feedback impedances for configuring a frequency range of operation of each TIA.
5. The method according to claim 1 , wherein the photodiodes are differentially coupled to the TIAs.
6. The method according to claim 1 , comprising performing optical continuous linear equalization (CTLE) by configuring gain levels of each of the TIAs.
7. The method according to claim 1 , comprising discriminating optical frequencies of the received signal by monitoring the magnitudes of the output signals from each of the TIAs using the processor.
8. The method according to claim 1 , wherein the optoelectronic receiver is on a semiconductor die.
9. The method according to claim 8 , wherein the semiconductor die comprises a silicon complementary-metal oxide semiconductor (CMOS) photonics die.
10. A system for communication, the system comprising:
an optoelectronic receiver comprising a grating coupler, splitters, photodiodes, a processor, and transimpedance amplifiers (TIAs), the optoelectronic receiver being operable to:
receive a modulated optical signal utilizing the grating coupler;
split the received signal into a plurality of optical signals using the splitters;
generate a plurality of electrical signals from the plurality of optical signals utilizing the photodiodes;
amplify the plurality of electrical signals utilizing the TIAs, wherein each TIA is configured to amplify signals in a different frequency range; and
discriminate, utilizing the processer, optical frequencies of the received signal based on magnitudes of output signals from each of the TIAs.
11. The system according to claim 10 , wherein one of the plurality of electrical signals is DC coupled to a low frequency TIA of the TIAs.
12. The system according to claim 10 , wherein one of the plurality of electrical signals is AC coupled to a high frequency TIA of the TIAs.
13. The system according to claim 10 , wherein the TIAs each have feedback impedances for configuring a frequency range of operation of each TIA.
14. The system according to claim 10 , wherein the photodiodes are differentially coupled to the TIAs.
15. The system according to claim 10 , wherein the optoelectronic receiver is operable to perform optical continuous linear equalization (CTLE) by configuring gain levels of each of the TIAs.
16. The system according to claim 10 , wherein the optoelectronic receiver is operable to discriminate optical frequencies of the received signal by monitoring the magnitudes of the output signals from each of the TIAs using the processor.
17. The system according to claim 10 , wherein the optoelectronic receiver is on a silicon complementary metal oxide semiconductor (CMOS) die.
18. A system for communication, the system comprising:
an optoelectronic receiver comprising a grating coupler, a splitter, first and second photodiodes, a delay element, a first transimpedance amplifier (TIA) configured for low frequency operation, a processor, and a second TIA configured for high frequency operation, the optoelectronic receiver being operable to:
receive a modulated optical signal utilizing the grating coupler;
split the received signal into two optical signals;
delay one of the optical signals using the delay element;
generate two electrical signals from the two optical signals utilizing the two photodiodes;
amplify the two electrical signals utilizing the first and second TIAs; and
discriminate, utilizing the processor, optical frequencies of the received signal based on magnitudes of output signals from each of the TIAs.