The PLANEX 1550 nm Laser Diode from Redfern Integrated Optics is a Narrow Linewidth External Cavity Laser Diode that operates from 1530 to 1565 nm. It delivers an output power of 30 mW and provides optical isolation of over 40 dB. The laser diode has a narrow linewidth of less than 1 kHz and is low sensitivity to vibration & acoustic noise. It consists of a gain chip and a planar lightwave circuit (PLC) that includes a Bragg grating. The laser diode is ideal for acoustic and seismic sensing, defense and security, oil & gas – exploration and production, LIDAR and remote sensing, interferometric fiber optic sensing, metrology, RF and microwave photonics, and coherent communication applications.