See specification and user manual of this transmitter module at 2nd pdf link below. Transmitter output power specification: 9dBm+/-1dBm. So the laser output power specification is at least 10mW. We opened one module, found there is Philips CQF933/3239 laser, see last 2 photos below. Laser specification would be similar to last pdf link below. It would fit the mainframe of store product code: OTI-Tx-L-050C. With SC/APC fiber adapter. They all come with key for keylock switch except one 1561.61nm module. 

We can remove laser from the transmitter module by desoldering machine with low-melting point solder, at extra $40 for the desoldering, testing, and packing work). 

General Description:
The Laser Link® Modular 1550 nm Optical Transmitters are part of an advanced transmission system designed to optimize network architectures and increase reliability, scalability, and cost effectiveness. The Laser Link 1550 nm Transmitter Family includes the Externally Modulated Transmitter (LEMT), Narrowcast Transmitter (LLNT), and Narrowcast Return Transmitter (LLNTR). These 1550 nm transmitters are designed to operate over a wide range of optical output powers and loss budgets, delivering both analog and digital signals. The 1550 nm LEMT applications include supertrunking, hub interconnects, broadcast transmission portion of DWDM architecture and 1310/1550 nm overlays. The LLNT converts input RF narrowcast signal in the 50-870 MHz frequency range to an optical output with a discrete ITU grid wavelength. Multiple outputs of LLNT products (20 currently) may then be transmitted over a single fiber through utilization of wave division multiplexing. The LLNTR converts RF signal inputs in the 5-210 MHz frequency range to an optical output with a discrete ITU grid wavelength. LLNTR outputs of differing wavelengths may then be combined for amplification and transport over a DWDM system. 

Common Features
• Full-width modules; seven transmitters in a 5 RU chassis
• User adjustable RF input drive power and RF input test point
• Multiple primary/redundant powering options
• Simple implementation and operation
• Excellent link performance
• Allows for simple optimization and configuration
• Network management (status monitoring) ready
• Front panel fiber interface 

LLNT/LLNTR Features
• Cost-effective targeted service solution
• Directly modulated DFB laser sources
• Front panel optical test points
• Wavelength on ITU grid
• Front panel LEDs indicate module condition and simplify troubleshooting