View stm81004 datasheet:

STM 81004X 1550 nm Laser in Coaxial Package with SM-Pigtail, STM 81005X Medium Power • Designed for application in fiber-optic networks • Laser diode with Multi-Quantum Well structure • Suitable for bit rates up to 1 Gbit/s • Ternary photodiode at rear mirror for monitoring and control of radiant power • Hermetically sealed subcomponent, similar to TO 18 • SM Pigtail with optional flange Type Ordering Code Connector/Flange STM 81004G Q62702-Pxxxx FC / without flange STM 81004A Q62702-Pxxxx DIN / without flange STM 81005G Q62702-Pxxxx FC / with flange STM 81005A Q62702-Pxxxx DIN / with flange Component with other connector types on request. Maximum Ratings Output power ratings refer to the SM fiber output. The operating temperature of the submount is identical to the case