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Semiconductors

Semiconductors

There is variation in the electrical conductivity of materials - metals, semiconductors, and insulators that are showcased with the help of the energy band diagrams.
Metals such as copper (Cu), zinc (Zn), or lead (Pb) have low resistivity and feature conduction bands that are either not fully occupied or overlap with the valence band, making a bandgap non-existent. This allows electrons in the highest energy levels of the valence band to easily transition to the conduction band upon gaining...

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Related Experiment Video

Updated: Jan 23, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Towards On-Chip Self-Referenced Frequency-Comb Sources Based on Semiconductor Mode-Locked Lasers.

Marcin Malinowski¹, Ricardo Bustos-Ramirez², Jean-Etienne Tremblay³

¹CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL 32816, USA. marcinmalinowski@knights.ucf.edu.

|June 20, 2019

Summary

This summary is machine-generated.

Miniaturized frequency combs using semiconductor lasers and integrated optics enable diverse applications. This review focuses on architectures for supercontinuum generation and stabilization for precise time and frequency distribution.

Keywords:

frequency combs heterogeneous integration integrated photonics mode-locked lasers nonlinear optics second-harmonic generation silicon photonics supercontinuum

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Last Updated: Jan 23, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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Published on: February 28, 2016

Generation and Coherent Control of Pulsed Quantum Frequency Combs

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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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Published on: November 22, 2019

Area of Science:

Optics and Photonics
Laser Physics
Integrated Photonics

Background:

Frequency combs are crucial for precise measurements.
Miniaturization is key for widespread applications.
Semiconductor lasers offer a path to compact sources.

Purpose of the Study:

To review architectures for miniaturized frequency comb sources.
To highlight the role of semiconductor mode-locked lasers.
To discuss supercontinuum generation and stabilization in integrated optics.

Main Methods:

Focus on semiconductor mode-locked laser architectures.
Exploration of supercontinuum generation.
Carrier-envelope offset detection and stabilization techniques.

Main Results:

Miniaturized frequency combs are feasible.
Integrated nonlinear optics are essential for compact systems.
Stable frequency combs can be generated from semiconductor lasers.

Conclusions:

Compact frequency comb sources have vast application potential.
Semiconductor laser-based integrated photonics is a promising approach.
Further development will enable advanced spectroscopy, metrology, and communication.