A single wavelength laser refers to a laser that outputs a single center wavelength laser, with a narrow spectral linewidth (usually less than 0.1nm) and high monochromaticity and coherence.
Mainly based on the guiding principle of optical fibers and the energy level transitions of rare earth elements. Fiber optics use SiO ₂ as the matrix material to achieve low loss transmission through total reflection of light. Rare earth elements (such as Er ³ ⁺, Tm ³ ⁺, etc.) act as gain media and undergo energy level transitions under external optical pumping excitation. Through stimulated radiation, photons are reflected and amplified multiple times in the fiber, forming stable laser output. The resonant cavity plays a key role in enhancing laser intensity.
Product Features:
High monochromaticity and coherence: The laser wavelength output by a single wavelength laser is pure and only has a clear frequency, which makes it highly valuable in fields such as spectroscopy and precision measurement.
Narrow linewidth: The spectral linewidth of single wavelength lasers is very narrow, usually less than 0.1nm, and can even reach the MHz level (such as some DFB fiber lasers, whose linewidth can be compressed to below 3MHz), which helps improve the accuracy of measurement and communication.
High stability: The laser power and wavelength stability of a single wavelength laser output are high, and short-term power fluctuations can be controlled within a very small range (such as less than 0.02dB within 15 minutes), and long-term fluctuations are also small (such as less than 0.05dB within 8 hours), making it suitable for applications that require high stability.
Diverse packaging forms: Single wavelength lasers can be provided in desktop or modular packaging according to application needs. Desktop packaging integrates temperature control, driver circuits, and communication interfaces (such as RS232), making it suitable for laboratory research and industrial deployment; Modular packaging has a smaller volume (such as 150x125x30mm) and can be directly embedded into optical modules or sensor systems.
With the development of artificial intelligence and automation technology, single wavelength lasers are gradually moving towards intelligence and automation. By integrating components such as sensors, controllers, and actuators, automatic calibration, monitoring, and control of the laser can be achieved, improving the usability and reliability of the equipment.