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

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Harmonic mode-locking using the double interval technique in quantum dot lasers.

Yan Li¹, Furqan L Chiragh, Yong-Chun Xin

¹Center for High Technology Materials, The University of New Mexico, 1313 Goddard SE, Albuquerque, NM 87106, USA. yanli@chtm.unm.edu

|July 20, 2010

Summary

This summary is machine-generated.

Passive harmonic mode-locking in quantum dot lasers was achieved using a novel double interval technique. This method uniquely selects higher harmonic frequencies by employing two separate absorbers, enabling precise control over laser repetition rates.

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Area of Science:

Optics and Photonics
Semiconductor Lasers
Quantum Dot Devices

Background:

Mode-locking is crucial for generating ultrashort optical pulses.
Quantum dot lasers offer unique advantages for optoelectronic applications.
Controlling harmonic frequencies in lasers is essential for various applications.

Purpose of the Study:

To demonstrate passive harmonic mode-locking in a quantum dot laser.
To utilize the double interval technique for selecting higher-order repetition rates.
To achieve unambiguous mode-locking at a specific harmonic frequency.

Main Methods:

Implementation of the double interval technique with two separate absorbers.
Utilizing quantum dot laser gain medium.
Operating absorbers to stimulate a specific higher-order repetition rate.

Main Results:

Successful passive harmonic mode-locking achieved.
A nominal 60 GHz repetition rate (10th harmonic) was unambiguously obtained.
The double interval technique enabled selection of the least common multiple harmonic frequency.

Conclusions:

The double interval technique is effective for passive harmonic mode-locking in quantum dot lasers.
This method allows for precise selection of higher harmonic repetition rates.
The technique offers flexibility in achieving diverse repetition rates.