Variation-Tolerant Wavelength Division Multiplexing Receiver And Transceiver, And Associated Methods

Patent metadata

Field	Value
Publication number	US-2016285581-A1
Application number	US-201415033520-A
Country	US
Kind code	A1
Filing date	Oct 31, 2014
Priority date	Oct 31, 2013
Publication date	Sep 29, 2016
Grant date	—

Abstract

A variation-tolerant receiver includes a plurality of receiver resonators configured to demultiplex a multiplexed modulated signal received from at least one wavelength division multiplexing (WDM) transmitter having a plurality of transmitter resonators and wherein operationally each of the receiver resonators has a receiver resonance linewidth not exceeding a minimum spacing between two adjacent transmitter resonances of the transmitter resonators, the receiver resonances collectively spanning a free spectral range of one of the receiver resonators such that the variation-tolerant receiver achieves gapless spectral response. A method passively compensates transmitter-receiver channel mismatch in a transceiver by: separating a broadband carrier into a plurality of narrowband transmitter carriers; modulating the narrowband transmitter carriers to form a plurality of modulated signals; multiplexing each of the modulated signals to form a multiplexed modulated signal; and demultiplexing the multiplexed modulated signal onto a plurality of receiver channels.

First claim

What is claimed is:

1 . A variation-tolerant receiver comprising:
a plurality of receiver resonators for demultiplexing a multiplexed modulated signal received from at least one wavelength division multiplexing (WDM) transmitter having a plurality of transmitter resonators, each of the receiver resonators having a receiver resonance linewidth not exceeding a minimum spacing between two adjacent transmitter resonances of the transmitter resonators; and the receiver resonances collectively spanning a free spectral range of one of the receiver resonators such that the variation-tolerant receiver achieves gapless spectral response.

2 . The variation-tolerant receiver of claim 1 , a center-to-center wavelength difference between any two adjacent receiver resonances being between 0.5 times and 1.5 times a linewidth of either one of said adjacent receiver resonances, such that any two adjacent receiver resonances overlap each other.

3 . The variation-tolerant receiver of claim 1 , a linewidth of each receiver resonator being equal and number of receiver resonators equaling or exceeding quotient of (a) a receiver resonator free-spectral range (FSR) and (b) the linewidth.

4 . The variation-tolerant receiver of claim 1 , the number of receiver resonators being at least twice number of transmitter resonators.

5 . The variation-tolerant receiver of claim 1 , a smallest FSR of any of the receiver resonators exceeding a maximum FSR of any of the transmitter resonators.

6 . The variation-tolerant receiver of claim 1 , number of receiver resonances being centered within a full-width at half maximum of a transmitter resonance, and equaling or exceeding total number of transmitter resonators when operating at any temperature between 25° C. and 50° C.

7 . The variation-tolerant receiver of claim 1 , linewidth of each receiver resonator equaling linewidth of each transmitter resonator.

8 . The variation-tolerant receiver of claim 7 , number of receiver resonators being greater than or equal to finesse of a transmitter resonator.

9 . The variation-tolerant receiver of claim 1 , each adjacent pair of transmitter resonances being separated in wavelength Δλ and having respective spectral widths δλ 1 and δλ 2 , Δλ exceeding ½(δλ 1 +δλ 2 ).

10 . The variation-tolerant receiver of claim 9 , a guard band between each adjacent pair of transmitter resonances having a spectral width equal to δλ−½(δλ 1 +δλ 2 ), that exceeds characteristic spectral shift of transmitter resonance resulting from process variation.

11 . The variation-tolerant receiver of claim 1 , each receiver resonator being a silicon-on-insulator device.

12 . (canceled)

13 . (canceled)

14 . The variation-tolerant receiver of claim 1 , further comprising a proximally-located variation-tolerant WDM transceiver
having a plurality of proximal transmitter resonators, each receiver resonance linewidth not exceeding a minimum spacing between two adjacent transmitter resonances of the proximal transmitter resonators.

15 . (canceled)

16 . (canceled)

17 . (canceled)

18 . (canceled)

19 . (canceled)

20 . (canceled)

21 . (canceled)

22 . (canceled)

23 . (canceled)

24 . (canceled)

25 . The variation-tolerant WDM transceiver of claim 14 , wherein
a proximal transmitter resonator comprises one of a microring resonator and a racetrack resonator and/or wherein a receiver resonator comprises one of a microring resonator and a racetrack resonator.

26 . The variation-tolerant WDM transceiver of claim 14 , further comprising a broadband light source optically coupled to the plurality of proximal transmitter resonators and having a bandwidth exceeding an FSR of each proximal transmitter resonator.

27 . (canceled)

28 . (canceled)

29 . A variation-tolerant receiver comprising a plurality of receiver resonators configured to demultiplex a multiplexed modulated signal received from a remotely-located wavelength division multiplexing (WDM) transmitter having a plurality of transmitter resonators,
each receiver resonator having perimeter, shape, cross-sectional dimensions, and bulk refractive index that determine a plurality of receiver resonances each having a receiver resonance linewidth in response to electromagnetic radiation propagating therethrough; each receiver resonance linewidth not exceeding a minimum spacing between two adjacent transmitter resonances of the transmitter resonators; and all receiver resonances collectively spanning a free spectral range of one of the receiver resonators such that the variation-tolerant receiver achieves gapless spectral response.

30 . (canceled)

31 . A method for passively compensating transmitter-receiver channel mismatch in a transceiver, comprising:
modulating a plurality of narrowband transmitter carriers to form a plurality of modulated signals; multiplexing each of the modulated signals to form a multiplexed modulated signal; and demultiplexing the multiplexed modulated signal to form a plurality of receiver signals, each receiver signal having a spectral width not exceeding a minimum spectral spacing between two adjacent transmitter carriers.

32 . (canceled)

33 . (canceled)

34 . (canceled)

35 . A method for variation-tolerant signal reconstruction, comprising:
receiving a multiplexed modulated signal, having a first center carrier wavelength, on one or more receiver channels of a plurality of receiver channels each having one of a respective plurality of center carrier wavelengths, the receiver channels that receive the modulated signal having a receiver center carrier wavelength closer to the first carrier wavelength than any other receiver center carrier wavelength.

36 . (canceled)

37 . (canceled)

38 . The method of claim 35 , the modulated signal having an associated transmitter channel that is one of a first plurality of transmitter channels, each having one of a respective plurality of center carrier wavelengths.

39 . The method of claim 35 , the number of receiver channels being at least twice the number of transmitter channels.

40 . The variation-tolerant receiver of claim 29 , further comprising a proximally-located WDM transmitter having a plurality of proximal transmitter resonators, each receiver resonance linewidth not exceeding a minimum spacing between two adjacent transmitter resonances of the proximal transmitter resonators.

Assignees

• Mickelson Alan
• Li Zheng
• Mohamed Moustafa
• Chen Xi
• Univ Colorado Regents

Inventors

• Mickelson Alan
• Li Zheng
• Mohamed Moustafa
• Chen Xi

Classifications

• H04B10/671

  for controlling the input optical signal · CPC title

• H04B10/40 Primary

  Transceivers · CPC title

• H04B10/516

  Details of coding or modulation · CPC title

• H04B10/801

  using optical interconnects, e.g. light coupled isolators, circuit board interconnections · CPC title

• H04J14/0254 Primary

  Optical medium access · CPC title