Applied Optoelectronics DFB-915-BT-06-2.5-C-LR-FA-503 TOSA Module

Applied Optoelectronics' DFB-915-BT-06-2.5-C-LR-FA-503 TOSA Module is a Transmitter Optical Subassembly (TOSA) by AOI that houses a distributed feedback (DFB) laser in a compact package. Designed for integration into fiber‑optic links and optical transceiver assemblies, it provides the laser output needed to launch light into fiber and form the transmitting side of a link. The model designation includes LR and FA-503 variants, and the product is described as "with laser," confirming the presence of an integrated laser diode within the module. This DFB TOSA consolidates the laser source, its basic drive interface, and thermal management in a single enclosure to support transmitter functionality in telecom and data‑communication systems that rely on AOI's DFB technology. Users typically deploy DFB TOSAs like this in applications requiring a compact, single‑device transmitter option for high‑speed fiber networks, where a stable light source from AOI's DFB laser lineage is advantageous. AOI TOSAs are commonly used together with matching ROSA and controller electronics to form complete transmitter assemblies in network equipment.