Relying on FP resonant cavity and multimode fiber coupling

The VLFL-PM series is centered around semiconductor laser diodes (LDs). All 21 models adopt the TO coaxial package dedicated to low-power LDs, featuring a compact structure and standardized installation. Optically, they uniformly employ integrated single-mode fiber-coupled output (equipped with a adhesive type self-focusing lens). The output laser conforms to a Gaussian spot distribution, and the fibers are all polarization-maintaining types, capable of stably maintaining the polarization state. They have an extinction ratio of 16-18dB, a spectral width of 2.0-3.0nm, and a wavelength temperature coefficient of 0.3nm/℃, with strong consistency in optical performance.

The parameters cover wavelengths from 405-1064nm (near-ultraviolet to near-infrared) and continuous output powers from 5-100mW; the fiber core diameter is 3-9μm, the numerical aperture is 0.12, the length is ≥1m, and it supports various connectors such as FC/APC and SMA905; electrically, it needs to be matched with a current source power supply, with an operating voltage of 1.55-8.0V, a threshold current of 12-100mA, and an operating current of 40-320mA. Some models are equipped with PD + pins for power monitoring.