IMM Photonics’ new laser diode module with single mode coupling offers highly stable performance across a wide range of temperatures. The module is cooled solely using a passive system – no thermoelectric cooler is required.
The construction consists of a compact pigtailed housing featuring an integrated electronic control system that can also be modulated as required. Power consumption is primarily determined by the applied laser diode (e.g. P = 1mW, λ = 635nm, Imax = 50mA), which is coupled with the housing in a way that ensures mechanical and thermal stability.
A special glass asphere is placed in the optical path and focuses the diode’s divergent laser beam directly onto the approximately 3.5µm single mode fibre. During the production process, the fibre is actively adjusted, allowing the coupling effect to be maximised by up to 50 per cent.
The new module can be employed wherever a high degree of temperature stability and robustness is required, but space and power supply are limited. The module thus lends itself to applications in measurement technology and medical engineering, industry and research as well as in surveying.