Single-mode Laser Diodes

What is a single-mode laser diode?

A single-mode laser diode (SMLD) is a specialized type of semiconductor lasers that operates in a single transverse mode. SMLD generates a focused and diffraction-limited output beam with high power density. This is achieved through easy beam collimation, which is facilitated by the unique design of the laser diode. The frequency of the SMLD is determined by the laser diode resonator parameters, which is in turn determined by the reflective facets of the laser diode. To achieve precise laser generation and wavelength selection, Distributed Feedback (DFB) laser diodes and Fiber-Bragg-Gratings (FBG) can be used. These devices help to stabilize the laser output and create a spectrum with evenly spaced frequency lines. Comb lasers are another type of laser that can produce a spectrum consisting of a series of equally spaced frequency lines.

Main applications of high-power single-mode laser diodes

High-power single-mode laser diodes are widely used in various industries due to their excellent accuracy, stability, and energy efficiency. High-power SMLDs are designed for use in applications where precise beam control and high performance are crucial. Some of the main areas where these lasers play a significant role are listed below:

• Telecommunications: Single-mode laser diodes are ideal for data transmission in optical networks due to their high stability and accuracy. SMLDs enable long-distance data transmission with minimal signal loss, making them essential in telecommunication systems. 
• Medical technology: Single-mode laser diodes have many applications in the medical field such as high-resolution imaging, laser diagnostics, and therapy in ophthalmology and dermatology. 
• Spectroscopy and metrology: Single-mode laser diodes facilitate molecular analysis and high-resolution measurements in spectroscopy, allowing for accurate analysis of chemical compounds and materials. These SMLDs are used in precision measurement systems, such as alignment systems, which rely on their stability and coherence to ensure accurate distance and displacement measurements.
• Industrial applications: Single-mode laser diodes support tasks such as cutting, welding, and 3D printing that require high precision and power.
• Quantum Technologies: Single-mode laser diodes allows entangled photon pairs generation and  quantum state control crucial for in quantum communication and computing. 
• Navigation: Single-mode diodes are used for distance measurement, LIDAR fabrication and mapping in various applications such as automotive, aerial, and geospatial.

Key features of single-mode laser diodes

Innolume single-mode laser diodes are designed to meet the highest standards of performance, providing precise and reliable results for a wide range of demanding applications. Whether you require high output power, flexible wavelength options, or versatile packaging configurations, our laser diodes are engineered with excellent stability in mind, making them easy to integrate into your systems. Below are some of the key features that make our products ideal for use in various industries and advanced technologies.

• High Output Power: Our lasers offer an impressive power output of up to 900 mW in continuous wave mode and up to 1.2 W in pulse mode. This makes them well-suited for even the most demanding applications. 
• Wide Range of Available Wavelengths: We have a variety of wavelengths available (780 nm – 1350 nm) to choose from, allowing you to select the optimal laser source for your specific application.
• Spectra Performance Variety: Our lasers allow for a diverse range of spectral characteristics. You can choose from various spectral shapes and linewidths.
• Packaging Options: You can choose between a fiber-coupled 14-pin butterfly package or a package with a free-space output beam, depending on your application. Single-mode fiber-coupled laser diodes have several advantages, including simplified alignment, improved system stability, versatile beam delivery, enhanced reliability, and seamless integration with fiber optic systems. The packaging with a free space output beam allows for flexibility in directing the laser beam. This can be done by using mirrors, lenses, or other optical elements to manipulate the trajectory and performance of the laser beam. You can choose from options such as a 9x TO-header, C-mount, or aluminum nitride carrier.

The Innolume technical support team is always here to help you choose the right single-mode laser diode for your needs and discuss any operational issues you may have. If you have any questions, please don't hesitate to contact us.