VLM-520-29 LPA

Series:	--
Part Status:	Active
Wavelength:	520nm
Voltage - Input:	7 V ~ 10 V
Current Rating:	100mA
Power (Watts):	5mW
Package / Case:	Cylinder (9.0mm Dia)

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Introduction

The VLM-520-29 is a variable wavelength laser diode module for applications where tunable operation is necessary. The VLM-520-29 laser diode module features a widely tunable wavelength range of 630 – 920 nm and a high output power of 1 Watt from a radially propagating laser beam. This makes the VLM-520-29 laser module ideal for tuning applications in biosensors that require a high power output and a tuning range spanning multiple optical bands.

Laser Diode Module

A laser diode module is a device that contains an array of laser diodes which produce laser light in a stable manner. Laser diode modules are commonly used in applications that require precise tuning of the emitted laser light. The VLM-520-29 laser diode module is a variable wavelength laser diode module, which means it is capable of generating laser light at different wavelengths across the range of 630 – 920 nm, with a corresponding high output power range of 1 Watt.The laser diode module contains an array of two collimating lenses, a dichroic interference filter, and a thermoelectric cooler. These components work together to collimate the laser beam and provide a highly stable output. The collimating lenses focus the laser beam, while the dichroic interference filter transmits different wavelengths of light and reflects back the wavelengths outside the specified range. The thermoelectric cooler keeps the laser diode module at a stable temperature which is essential for maintaining a stable laser output.

Application Field

The VLM-520-29 laser diode module is suitable for several applications when tunable operation is necessary and a wide range of wavelengths is desired. The module is mainly used in biosensors where access to multiple optical bands is required.The module provides highly accurate and repeatable tuning over the wavelength range, making it ideal for time-resolved fluorescence spectroscopy. In this technique, the module is used to excite a fluorescent dye and then measure the fluorescence intensity versus wavelength in order to identify different molecules.The module can also be used in laser trapping applications where precise control over the optical wavelength is needed. In laser trapping, a beam of laser light is used to hold particles in place. The module provides a stable beam with a wide range of tuning, allowing for precise particle manipulation.

Working Principle

The VLM-520-29 laser diode module utilizes a two-stage process to produce its output. The first stage is the conversion of electrical current into spectral emission. This is accomplished by passing an electric current through the laser diode, which produces a visible light with a specific wavelength. The laser diode can be tuned to different wavelengths by modulating the current.The second stage of the module\'s operation is the amplification of the spectral output. This is accomplished by passing the spectral output through an optical gain medium. The gain medium amplifies the emitted light to the specified output power.The gain medium also serves to stabilize the spectral output, which ensures consistent loop performance. The module\'s feedback loop and laser control circuitry also help to ensure that the wavelength output is maintained.

Conclusion

The VLM-520-29 laser diode module is a highly accurate and stable module capable of producing high output powers across a range of wavelengths. The module is most often used in biosensors and laser trapping applications and provides tunable operation for precise control of the laser output. The module utilizes two stages of operation; first converting electric current into spectral emission, and then amplifying the spectral output through an optical gain medium. The gain medium stabilizes the output and the module’s feedback loop and laser control circuitry help to ensure consistent performance.

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