Packaging in HHL housing
Packaging in HHL housing
The HHL housing is a sealed collimated housing for CW or pulsed lasers. It is ideal for short-run integration and use in difficult environments. The HHL housing is much smaller than the LLH and is completely sealed. The HHL contains a Peltier junction and a NTC temperature sensor (model 10K4CG), which can be controlled by the TC3 or your own temperature control system. Heat dissipation is performed by thermal contact with its copper base; the heat dissipation capacity depends on the operation mode and environmental conditions.
- Size : 44.5 mm x 31.7 mm x 19 mm
- Sealed Package
- Base to be attached on flat heatsink surface (such as HHL Heatsink plate) using M3 screws
- Peltier cooled laser-stage inside, temperature differential up to 60°C
- Anti-reflection coated ZnSe protective window
- Internal lens
- Collimated free-space beam, divergence < 6 mrad
- NTC temperature measurement.
- Needs cool backplate (e.g. HHL Heatsink plate or other that can keep the backplate at +20°C with a 0.1°C/W thermal resistance.).
- Support lasers with dissipation < 12 W on NS, AN or AN-NSP mounts
The HHL housing is also offered with a pigtailed optical fiber output. Indium Fluoride optical fibers are offered for wavelengths of 5 μm or shorter; contact us to enquire about using other types of fiber.
Peltier cooling
There are three options for the Peltier cooler integrated inside the package, 1-stage, 2-stage and HP (high power). The 1-stage and 2-stage cooler have the same cost and the most appropriate one will be chosen depending on the expected operation conditions. The HP cooler is more appropriate for lasers with very high dissipation and is more expensive. Their respective performances are shown in the graph below, with the performances of the much larger LLH for comparison.