The D2-100-DBR laser module provides a highly agile, mechanically robust laser in a 4×4 inch footprint. The distributed Bragg reflector (DBR) laser diode is packaged in a precision temperature-controlled module with beam conditioning optics (anamorphic prism pair) and a 35-dB optical isolator*. DBR laser diodes are fabricated with the feedback grating patterned directly adjacent to the gain section of the diode. They are highly insensitive to vibrations and, by virtue of a short (~1 mm) cavity, can be current tuned over more than 40 GHz mode hop-free.  As a result, the laser is capable of fast servo control with the D2-125 Reconfigurable Servo or other loop filters for easy locking to atomic and molecular transitions.  Moreover, the module contains no moving parts or piezo-electrics and is therefore inherently robust and rugged. The laser diode output is collimated with a 0.55 NA lens mounted to a movable plate for pointing adjustments.

DBR lasers have 2-3 times larger temperature and current tuning coefficients than external-cavity diode lasers (ECDLs). We precisely control this agility by employing two stages of temperature control and driving the injection current with a precision, D2-105 Low-noise Current Controller with a fast servo input.  Therefore, D2-100 lasers respond faster to environmental challenges than conventional ECDLs.

We are proud to introduce a high-power version of this widely used, versatile laser.  Now we offer over 100 mW of tunable light at 780.24 nm, covering the D2 transitions of Rubidium and 170 mW at 852 nm for the D2 lines of Cesium.  The high-power versions of the D2-100 laser series are built with two optical isolators (>60 dB of isolation) to ensure smooth, stable operation.

These lasers are designed to be current- and temperature-stabilized and locked to atomic transitions.  The D2-125 Reconfigurable Servo can tightly lock the D2-100 series lasers, reducing linewidth and eliminating frequency drift.  The D2-210 Spectroscopy Module can supply the saturated absorption signal that serves as the frequency reference for locking.  A second D2-100 laser can be offset phase locked to a master laser using the D2-135 Offset Phase Lock Servo.  A complete atom-referenced, frequency agile laser system.

View a typical configuration of a D2-125 servoing a D2-100-DBR laser.