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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

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Mode-locked silicon evanescent lasers.

Brian R Koch, Alexander W Fang, Oded Cohen

|June 24, 2009

Summary

This summary is machine-generated.

Electrically pumped silicon lasers achieve 40 GHz pulse repetition rates. These mode-locked lasers produce 4 ps pulses, ideal for high-speed data transmission and optical networking technologies.

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Area of Science:

Photonics and optoelectronics
Integrated silicon photonics
Laser technology

Background:

Silicon photonics is crucial for advanced optical communication systems.
High-speed, low-jitter lasers are essential for data transmission and clock distribution.
Existing silicon laser technologies face limitations in performance and integration.

Purpose of the Study:

To demonstrate electrically pumped lasers integrated on a silicon platform.
To achieve high repetition rates and short pulse durations for advanced applications.
To explore both passive and hybrid mode-locking techniques for silicon lasers.

Main Methods:

Fabrication of electrically pumped lasers on silicon substrates.
Implementation of mode-locking techniques (passive and hybrid).
Characterization of laser performance, including repetition rate, pulse width, jitter, and extinction ratio.

Main Results:

Demonstrated electrically pumped silicon lasers with repetition rates up to 40 GHz.
Generated ultrashort pulses of 4 picoseconds (ps) with low timing jitter.
Achieved extinction ratios exceeding 18 dB, confirming high-quality pulse generation.

Conclusions:

Electrically pumped silicon lasers offer a viable solution for high-speed optical communication.
The demonstrated performance is suitable for data and telecommunication transmitters.
These lasers pave the way for silicon-based integrated technologies like optical time division multiplexing (OTDM), wavelength division multiplexing (WDM), and optical code division multiple access (OCDMA).