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Related Experiment Video

Updated: Jun 22, 2026

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Design optimisation for obtaining flat, high power supercontinuum source over C + L band.

Charu Kakkar¹, K Thyagarajan

¹Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110016, India. charukakkar@rediffmail.com

|June 17, 2009

Summary

We developed an optimized fiber design for high-power, spectrally flat supercontinuum (SC) generation in optical communications. This design achieves over 30 dBm output power across a 90-nm bandwidth without soliton decay.

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Area of Science:

Optics and Photonics
Optical Communications Engineering

Background:

Supercontinuum (SC) sources are crucial for optical communication systems, but achieving high power and spectral flatness simultaneously remains challenging.
Existing SC generation methods often suffer from spectral distortions or power limitations, hindering their practical application.

Purpose of the Study:

To propose and optimize a novel fiber design for generating spectrally flat, high-power supercontinuum (SC) light.
To ensure the SC generation operates within the C+L communication bands with enhanced spectral characteristics.

Main Methods:

Utilized numerical simulations to optimize fiber dispersion profiles, pulse widths, and fiber lengths for controlled SC bandwidth expansion.
Focused on achieving SC generation in the absence of soliton decay to maintain spectral integrity and high output power.
Investigated the physical mechanisms governing SC generation for precise parameter control.

Main Results:

Demonstrated a single-mode output with optical power exceeding 30 dBm (+/- 0.5 dB).
Achieved a spectrally flat output over a 90-nm bandwidth.
Required only approximately 16 pJ of input pulse energy for the optimized SC generation.

Conclusions:

The proposed optimized fiber design enables high-power, spectrally flat supercontinuum generation suitable for C+L band optical communications.
The design offers a promising solution for next-generation optical communication systems requiring robust and efficient light sources.