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Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Hundred-femtosecond-level concise optical time delay measurement system based on linear optical sampling.

Yufei Zhang¹, Ziyang Chen¹, Dongrui Yu¹

¹State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics, and Center for Quantum Information Technology, Peking University, Beijing 100871, China.

The Review of Scientific Instruments

|December 8, 2023

Summary

This summary is machine-generated.

We developed a precise optical time delay measurement system using linear optical sampling. This simplified system, employing two optical frequency combs, achieves sub-100 fs precision for fiber length fluctuation analysis.

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Area of Science:

Optics and Photonics
Metrology
Fiber Optics

Background:

Fiber-delay measurement is crucial for various scientific and technological fields.
Accurate measurement of time delays in optical fibers is essential for system performance.

Purpose of the Study:

To propose and demonstrate a high-precision, simplified optical time delay measurement system.
To achieve measurement precision better than 100 femtoseconds (fs).
To investigate the precision limitations of the developed system.

Main Methods:

Utilizing linear optical sampling technique.
Employing two optical frequency combs without carrier-envelope-offset frequency locking.
Analyzing timing jitter noises from frequency sources.

Main Results:

Demonstrated a high-precision and concise optical time delay measurement system.
Achieved precision better than 100 fs under averaging.
Identified timing jitter as a primary limitation, mainly non-common mode and source-restricted.
Showcased the capability to measure fiber length fluctuations below 10 µm.

Conclusions:

The proposed system offers a simplified yet highly precise method for optical time delay measurement.
The system's precision is sufficient for detecting small fiber length fluctuations, enabling external disturbance analysis.
This technology has potential applications in fields requiring accurate fiber link monitoring.