Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
Method for all-optical Clock Recovery from Optical Data in Advanced Modulation Formats
Categories for this Invention
Technology: All-optical clock recovery from optical data (Method)
Category: Photonics
Industry: Optical Fiber
Application: Mid-span 3R regeneration in long-haul optical fiber
Market: The global market size is projected to grow from US$ 9.32 billion in 2022 to US$ 18.76 billion by 2030 with an CAGR of 9.1% from 2022 to 2030.
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Problem Statement
- All-Optical Clock Recovery in High-Speed Optical Communication Systems
- Crucial for mid-span 3R regeneration in long-haul optical communication systems.
- Advanced modulation formats and non-return-to-zero pulse shape increase spectral efficiency.
- Clock recovery scheme should be adaptable to various modulation formats and scalable to high symbol rates.
- Stringent requirements on optical signal to noise ratio (OSNR) make mid-span regeneration increasingly relevant.
- Injection mode-locking of fiber lasers offers flexible solution for all-4 optical clock recovery.
- Need for improved method for all-clock recovery from optical data in advanced modulated formats.
Technology
- A method for all-optical clock recovery from optical data in advanced modulation formats, is disclosed herein.
- Improved All-Optical Clock Recovery Method
- Involves injection mode-locking of Erbium-doped fiber laser.
- Involves injection mode-locking of Erbium-doped fiber laser.
- Involves injection mode-locking of Erbium-doped fiber laser.
- Based on NPR-SA configuration.
- The method is not limited by the wavelength of the input signal across the C-band.
Key Features / Value Proposition
Nonlinear Semiconductor Optical Amplifier Use
- Enhances clock tones in NRZ signals.
Optical Clock Recovery Stage
- Recovers optical clocks in advanced modulation formats.
- Utilizes injection mode-locking.
“10 Gbaud NRZ Optical Data Recovery”
- Injection mode-locking of EDF laser.
- Achieves advanced modulation formats.
Enhancing Clock-Tones through Signal Amplification
- Resulting in mixed spectral components.
- Increased carrier-to-sideband power ratio.
Improved resilience
- The recovered clock signals demonstrate improved resilience to input optical signal to noise ratio (OSNR) conditions.
The root-mean-square RMS Timing
- (RMS) timing jitter of the recovered clock signals is measured to be ≤ 3ps.
Scaling data rates
- All-optical clock is recovered in short-haul systems for scaling data rates by bypassing the bandwidth bottleneck due to optical-to-electrical conversion signals.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Balaji Srinivasan & Prof. Deepa Venkitesh
Department of Electrical Engineering.
Intellectual Property
IITM IDF Ref. 1836
Patent No: IN 547302
Technology Readiness Level
TRL- 4
Experimentally validated in Lab