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660GHz Solitons Source Based on Modulation Instability in Short Cavity.

Y Gong, P Shum, D Tang

|May 28, 2009

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Area of Science:

Optoelectronics
Photonics
Optical Communications

Background:

High repetition rate ultrashort soliton sources are essential for next-generation optical fiber communication systems.
Modulation instability (MI) is a key phenomenon for generating such pulses in fiber lasers.

Purpose of the Study:

To propose a simple, passively mode-locked fiber ring laser for generating ultrashort soliton pulse trains.
To achieve a very high repetition rate suitable for advanced optical communication.

Main Methods:

A passively mode-locked fiber ring laser operating at 1566 nm was designed.
The laser cavity incorporated high Erbium-doped (6470ppm) Bismuth fiber.
The laser was operated based on the modulation instability (MI) theory.

Main Results:

A soliton pulse train was successfully observed for the first time in a short (11.5m) cavity.
The generated pulses had an ultrashort pulse width of 420 fs.
A record repetition rate of 660 GHz was achieved.

Conclusions:

The proposed fiber ring laser design is a viable and simple method for generating high-repetition-rate ultrashort soliton pulses.
This technology has significant potential for enabling future high-capacity optical fiber communication networks.