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Quasi-light Storage for Optical Data Packets
07:45

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Published on: February 6, 2014

40Gbit/s coherent optical receiver using a Costas loop.

Hyun-chul Park1, Mingzhi Lu, Eli Bloch

  • 1ECE Department, University of California at Santa Barbara, Santa Barbara, CA 93106-9560, USA. hcpark@ece.ucsb.edu

Optics Express
|December 25, 2012
PubMed
Summary
This summary is machine-generated.

This study presents a compact, integrated coherent optical receiver achieving 40 Gbit/s performance. The novel design utilizes a Costas loop for stable homodyne optical phase locked loop (OPLL) operation with low power consumption.

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Area of Science:

  • Photonics and Optical Communications
  • Integrated Circuit Design

Background:

  • Coherent optical receivers are crucial for high-speed data transmission.
  • Achieving stable optical phase locked loops (OPLLs) in compact integrated systems presents significant challenges.

Purpose of the Study:

  • To report a highly integrated 40 Gbit/s coherent optical receiver.
  • To demonstrate the efficacy of a Costas loop for stable homodyne OPLL operation within a compact photonic integrated circuit.

Main Methods:

  • Integration of a photonic IC, electrical IC, and hybrid loop filter on a single 10x10mm(2) substrate.
  • Characterization of individual components and analysis of the feedback loop system for stability.
  • Implementation of a Costas loop as a homodyne OPLL.

Main Results:

  • Achieved a stable homodyne OPLL with a 1.1 GHz loop bandwidth and 120 ps loop delay.
  • Demonstrated error-free performance (BER<10(-12)) up to 35 Gbit/s.
  • Attained BER<10(-7) at 40 Gbit/s with no latency and power consumption below 3 W.

Conclusions:

  • A highly integrated, compact, and power-efficient 40 Gbit/s coherent optical receiver has been successfully developed.
  • The Costas loop architecture proves effective for stable homodyne OPLL in integrated systems.
  • This technology enables high-speed, low-latency optical communication with reduced form factor and power.