Contents
Source: TOPTICA Photonics AG
Understanding External-Cavity Diode Lasers
An external-cavity diode laser is a type of laser that utilizes a laser diode chip within a larger cavity containing optical elements. This setup allows for various enhancements and features compared to standard laser diodes.
Features and Options
The external cavity of these lasers offers the following features:
- Use of optical filters for determining emission wavelength and reducing emission linewidth.
- Possibility of wavelength tuning using adjustable optical elements.
- Lower phase noise and smaller emission linewidth due to a longer resonator.
- Compact design with the potential for miniature setups.
Tunable External-Cavity Diode Lasers
Tunable external-cavity diode lasers employ diffraction gratings for wavelength selection. They offer flexibility in tuning emission wavelengths for various applications.
Mode-Locked External-Cavity Diode Lasers
In mode-locked external-cavity diode lasers, the laser operates in a pulsed mode, offering unique properties that make them suitable for specific applications such as data transmission and laser absorption spectroscopy.
Applications
External-cavity diode lasers find applications in optical communications for data transmission and laser spectroscopy for gas analysis.
Overall, external-cavity diode lasers provide a versatile platform for various applications requiring precise control over emission characteristics and tunability.
Source: AOSense, Inc.
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