Integrated Frequency-Stabilized and Frequency-Shifted Light Source

The Fre-Lock & Shift integrated light source is widely utilized in laser wind LiDAR, precision spectroscopy, sensing, and metrology. The system architecture consists of the Fre-Lock stabilization module and the optional Fre-Shift frequency-shifting module. Frequency Stabilization Module (Fre-Lock) Designed for precise laser frequency locking, the Fre-Lock module features a modular architecture that integrates a narrow-linewidth laser, a gas absorption optical path, and feedback electronics. It supports both Absorption Edge Midpoint Locking and PDH (Pound-Drever-Hall) Locking, delivering a frequency-stable seed laser output at the hundred-milliwatt level. Frequency Shifting Module (Fre-Shift) — Optional Working in tandem with the stabilization module, the Fre-Shift module enables frequency shifting based on a stabilized frequency. It offers a maximum shifting range of 3.5 GHz with an accuracy of 2 MHz. The module integrates high-precision seed driver temperature control, a digital frequency-phase discriminator, and loop filters. It supports LD current/temperature PID feedback control, multi-channel AD acquisition, and DA output. Core Technology: Iodine Molecular Absorption Edge Stabilization The system locks to the midpoint of iodine absorption line edges. By utilizing a high-speed FPGA feedback control module, three-stage stabilization loop control, and optical power feedback technology, it ensures long-term, high-stability laser output. The host computer software stores parameters for various absorption lines, allowing seamless switching between Lines 1104-1111. The system features an automatic re-locking function in case of accidental de-locking, and supports manual or automatic calibration of the stabilized wavelength at any time. The Fre-Lock & Shift integrated light source is structurally stable and highly reliable, ensuring reliable 24/7 long-term operation.