Lambda Light DFB Tunable Laser Module

The Lambda Light DFB Tunable Laser Module is an internally cooled, InGaAsP, phase shifted, distributed-feedback (DFB) laser designed for 1.5 µm applications. The laser is available in both a constant wavelength (CW) and directly modulated laser (DML) mode. It is suitable for use in most metro applications up to 80 km, and because of its stable wavelength, narrow line width, and continuous tuning capability, is also a good choice for various instrumentation applications.

Features
'Highly stable, phase shifted, distributed feedback (DFB) laser
'Continuously tunable over minimum 4 ITU wavelengths at 100 GHz spacing
'Continuously tunable over minimum 8 ITU wavelengths at 50 GHz spacing
'Full C band coverage available
'Available as CW or directly modulated up to 2.5 Gbits/s
'Industry-standard, hermetic, 14 pin butterfly package
'Proven temperature tuning method
'Integrated optical isolator
'80 KM range with low dispersion penalty
'InGaAs, PIN photodetector back-facet monitor

Controlled Feedback
The module contains an internal optical isolator that suppresses optical back reflection in laser-based, fiber-optic systems. Light reflected back to the laser is attenuated a minimum of 30 dB.

Controlled Temperature
An integral thermoelectric cooler (TEC) provides stable thermal characteristics. The TEC allows for heating and cooling of the laser chip and thermally tune the laser wavelength by changing temperatures from 0 o C to +40 o C. The laser temperature is monitored by the internal thermistor, which can be used with external circuitry to control the laser chip temperature.

Controlled Power
An internal, InGaAs, PIN photodiode functions as the back-facet monitor. The photodiode monitors emission from the rear facet of the laser and when used in conjunction with external control circuitry, can control optical power launched into the fiber. Normally, this configuration is used in a feedback arrangement to maintain the flatness of the laser output power.

N/A, 22349 E. La Palma Ave., Yorba Linda, CA 92887. Tel: 714-692-7200; Fax: 714-692-7201.