980-nm pump laser features tight tracking

August 3, 2005 Berlin, Germany -- Lumics has introduced what it calls an improved version of its LU975M300 pump laser module. The company says the device's accuracy photo monitor function enables tight tracking of fiber-coupled power via the monitor diode signal. Target applications included Erbium Doped Fiber Amplifiers (EDFAs) without front fiber tabs for tracking.

According to the company, the cooled, 14-pin butterfly module features an improved internal photo diode design which monitors the optical output. The company notes that EDFA designs benefit from this function, as it requires no additional external monitor function in the fiber.

The module's tracking error is specified at operating power of up to 300 mW with +/- 10% in temperatures ranging from 0 to 25°C to 25 to 70°C, respectively. The device's low profile package design has a footprint of 30 x 15.2 mm and a height of 7.8 mm.

The LU975M300 series is available with Corning HI 1060 fiber. Polarization maintaining fiber can be ordered as an option. The devices conform with Telcordia GR-468-CORE requirements. The company's proprietary laser passivation technology enables superior optical output power. The company says its current generation of modules offers up to 330 mW nominal output power, and features a fiber bragg grating (FBG) for wavelength stabilization.