The ILX Lightwave LDC-3724 Laser Diode Controller conveniently offers both laser diode current and temperature control in the same instrument. It is a dual-range current source offering 16 W TEC and 200/500 mA LD output current. It offers a low noise, highly stable current source operating in one of three modes: constant current, high bandwidth or constant optical power. Mode 1 is optimized for DC operation, supports external modulation and offers improved laser protection and noise performance. In Mode 2, the output stage supports higher frequency, external modulation with control circuitry optimized for high bandwidth operation. Mode 3 supports constant optical power operation, using photodiode input current as the control setpoint.