The Clarity Series from Wavelength References are Frequency-Locked Semiconductor Lasers that operate at wavelengths of 1312 nm or 1550 nm. They deliver an output power of 2 mW - 25 mW and operate in two lock modes: line narrowing mode & reference mode. These lasers have a laser linewidth of up to 50 kHz - 150 kHz (line narrowing mode) & 1 MHz - 5MHz (reference mode). They have an allan deviation below 1 x 10-9 - 5 x 10-10 and side mode suppression above 35 dB. These lasers have an absolute accuracy of less than ± 0.02 pm and maximum wavelength short-term stability of 5 MHz (reference mode) & 1 MHz (line narrowing mode). They can be controlled via SCAPC & RS-23 interfaces and support SMF28e & PM Panda output fibers. These lasers require an AC supply voltage of 90 V - 250 V and consume 0.5 A of current. They are ideal for calibration of optical instrumentation, sensing, interferometry, and coherent communication applications.