Narrow linewidth VCSELs with high mode stability and low temperature tuning coefficient for portable applications Manchester-based Integrated Compound Semiconductors (ICS) has announced the launch of a VCSEL specifically designed for atomic clock and quantum magnetometer applications. VCS894.6-DP is a planar device, with single longitudinal mode emission at 894.6nm, the wavelength corresponding to the D1 transition line of Cs atoms. The device offers high mode stability, with side mode suppression ratio (SMSR) of 25dB and narrow spectral linewidth of 40M...