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Photonics Dictionary
laser diode module
A laser diode module is a compact device that incorporates a laser diode, optics, and often other components into a single package. These modules are designed to provide a convenient and efficient means of generating a laser beam with specific characteristics for various applications.
laser diode module suppliers →
Here is an overview of the key components and features of a typical laser diode module:
Laser diode:
At the core of the module is the laser diode itself. A laser diode is a semiconductor device that emits coherent light when an electric current passes through it. Laser diodes come in various wavelengths, power outputs, and beam profiles, depending on the application requirements.
Optics:
Laser diode modules usually include optics to shape and control the laser beam emitted by the diode. This may include collimating lenses to produce a well-defined parallel beam, focusing lenses to concentrate the beam at a specific distance, or other optical elements to shape the beam profile.
Housing:
The laser diode and optics are housed within a protective casing or enclosure. The housing not only protects the internal components but also provides mounting options and interfaces for connecting external equipment.
Driver circuitry:
Laser diode modules often include integrated driver circuitry to regulate the electrical current supplied to the diode. This ensures stable operation and prevents damage to the diode from overcurrent or voltage spikes.
Temperature control:
Some laser diode modules incorporate temperature control features to maintain stable operating conditions for the diode. This may include built-in thermoelectric coolers (TECs) or temperature sensors to monitor and adjust the temperature as needed.
Control interface:
Many laser diode modules feature a control interface for adjusting parameters such as output power, modulation frequency, and beam intensity. This interface may consist of manual controls, digital interfaces (e.g., USB, RS-232), or analog input/output ports.
Laser diode modules are utilized in a wide range of applications across various industries, including:
Laser pointers and handheld lasers for presentations, alignment, and demonstrations. Industrial laser systems for cutting, engraving, welding, and materials processing. Medical devices for surgery, dermatology, ophthalmology, and diagnostics. Scientific research, including spectroscopy, microscopy, and laser-based experiments. Consumer electronics such as barcode scanners, DVD players, and laser printers.
Overall, laser diode modules offer a versatile and compact solution for generating laser light in a wide range of applications, providing flexibility, precision, and reliability.
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