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Related Concept Videos

The Ideal Diode01:15

The Ideal Diode

A diode is a semiconductor device that allows current to flow in one direction only, making it a crucial component in electronic circuits for controlling the direction of current flow. An ideal diode is a simplified version of a real diode used to understand how diodes work in circuits. It possesses two terminals: the positive anode and the cathode, which is negative. When a positive voltage is applied to the anode relative to the cathode, the diode is in a forward-biased state, allowing...
Diode: Reverse bias01:14

Diode: Reverse bias

A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...
Diode: Forward bias01:20

Diode: Forward bias

In semiconductor devices, diodes play a crucial role in directing current flow, and its operation is primarily categorized into forward bias and reverse bias. A diode is said to be forward-biased when its p-type region is connected to the positive terminal of a battery and its n-type region is linked to the negative terminal. This configuration reduces the potential barrier within the diode, allowing current to flow easily from the p to the n-type region.
The behavior of a diode in forward bias...
Schottky Barrier Diode01:27

Schottky Barrier Diode

Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...

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Updated: Jun 20, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Diode-pumped Cr:LiSrAlF(6) laser.

R Scheps, J F Myers, H B Serreze

    Optics Letters
    |September 25, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study demonstrates efficient diode pumping of a chromium-doped lithium strontium aluminum fluoride (Cr:LiSrAlF(6)) laser. High-power diode pumping achieved significant continuous wave and pulsed output powers, showcasing potential for advanced laser applications.

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    Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
    09:38

    Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

    Published on: December 18, 2015

    Area of Science:

    • Laser physics and engineering
    • Solid-state laser development
    • Materials science for optical applications

    Background:

    • Diode-pumped solid-state lasers offer advantages in efficiency and compactness.
    • Chromium-doped LiSrAlF(6) (Cr:LiSrAlF(6)) is a promising gain medium for visible and near-infrared lasers.
    • Achieving high output power from Cr:LiSrAlF(6) lasers requires efficient pumping architectures.

    Purpose of the Study:

    • To investigate diode pumping strategies for a Cr:LiSrAlF(6) laser.
    • To demonstrate power scaling using high-power diode lasers.
    • To characterize the performance and optical properties of the laser resonator.

    Main Methods:

    • Diode pumping of a Cr:LiSrAlF(6) laser using commercial 10-mW visible laser diodes and a higher-power 100-mW continuous wave (cw), 265-mW pulsed diode.
    • Demonstration of polarization combination of pump diodes to reach laser threshold.
    • Optical characterization of the laser resonator, including passive loss measurements.

    Main Results:

    • Laser threshold achieved using polarization combination of two low-power diodes.
    • Continuous wave (cw) output power of 19.9 mW and pulsed output power of 78 mW obtained with high-power diode pumping.
    • Passive losses in the Cr:LiSrAlF(6) crystal measured to be less than 0.1% cm(-1).

    Conclusions:

    • High-power diode pumping is effective for achieving significant output powers from Cr:LiSrAlF(6) lasers.
    • The demonstrated pumping architecture and crystal quality enable efficient laser operation.
    • Low passive losses in the Cr:LiSrAlF(6) crystal contribute to high laser performance.