IdealPhotonics' 1600-1700nm VCSEL diodes are ultra-long-wavelength vertical-cavity surface-emitting lasers based on the InP/InGaAs material system. Employing strain-compensated quantum dots and composite dielectric film DBR technology, they achieve L-band (1565-1625nm) and U-band (1625-1675nm) emission, featuring ultra-narrow linewidth (<0.1nm) and ultra-high temperature stability (±0.01nm/℃). This revolutionary light source is designed for cutting-edge applications such as next-generation fiber optic communication (1625nm monitoring band), mid-infrared spectral analysis (1650nm molecular fingerprint region), and space laser communication.Employing InP-based InGaAs/InAlGaAs strained superlattice and composite dielectric film DBR technology, it achieves L/U band emission with ultra-narrow linewidth (<0.1nm) and ultra-high wavelength stability (±0.01nm/℃). It has irreplaceable spectral accuracy in cutting-edge fields such as 1625nm fiber monitoring, 1650nm molecular fingerprint detection, and space laser communication. Its single-wafer integration characteristics can reduce system power consumption by 40% compared with traditional DFB lasers.