Description
The D1861D direct-modulated laser (DML) module is a cost-effective solution for 10 Gbits/s digital transmission up to 50 km using traditional intracity SMF-28† single-mode fiber links. The 1310 nm wavelength eliminates the need for concern about dispersion control over most installed intracity fiber plants. The package contains a high-speed DFB laser chip, thermoelectric cooler, thermistor, optical isolator, and a rear-facet monitor photodiode, which allows for external optical power control.

Features
■ Direct-modulated 1310 nm laser module characterized for use in 10 Gbits/s operations up to 50 km
■ High package slope efficiency
■ Average optical output power capability, 10 dBm
■ Temperature stabilized with internal thermoelectric cooler (TEC), enabling operation within a wide temperature range of –5 °C to +80 °C
■ Hermetically sealed optics, isolator on TEC
■ GPO* RF connector
■ Single-mode fiber pigtail
■ High relaxation frequency at low bias

Applications
■ SONET/SDH low-cost metro applications
■ High-speed data communications
■ DWDM equipment drop-side applications