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Double-pulse laser based on a semiconductor optical amplifier.

H G Pan, A L Zhang, Y M Shi

|July 21, 2015

Summary

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A novel double-pulse fiber laser utilizing a semiconductor optical amplifier (SOA) was developed. This laser generates two distinct pulses with adjustable repetition frequencies and pulse widths for diverse optical applications.

Area of Science:

Optics and Photonics
Semiconductor Lasers
Fiber Optics

Background:

Semiconductor optical amplifiers (SOAs) are crucial components in modern optical systems.
Controlling pulse characteristics in fiber lasers is essential for various applications.
Asymmetric placement of gain media can influence laser dynamics.

Purpose of the Study:

To propose and demonstrate a novel double-pulse fiber laser design.
To investigate the effect of SOA placement on laser output.
To achieve tunable repetition frequencies and pulse widths.

Main Methods:

A fiber loop laser incorporating an asymmetrically placed semiconductor optical amplifier (SOA) was constructed.
A polarization controller was used to tune laser parameters.

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Optical pulses were analyzed for repetition frequency and pulse width.

Main Results:

The proposed laser successfully generated double pulses.
Repetition frequencies of 10.05 MHz and 12.70 MHz were observed.
Pulse widths of 33.40 ns and 30.13 ns were measured, with identical widths for the double pulses.

Conclusions:

The asymmetric SOA placement in a short fiber loop enables stable double-pulse generation.
The laser design offers control over repetition frequency and pulse width through polarization adjustment.
This double-pulse laser has potential applications in optical communications and sensing.