Laser Components is proud to offer single-mode VCSELs which are optimised for resonant Rubidium excitation at 794.7nm and for resonant Cesium excitation at 852.1nm (894.3nm on request). Precise selection criteria enable optimised excitation efficiency; and high modulation frequencies allowing coherent population trapping (CPT) with a power consumption as low as 5mW. To enable an extended operating temperature range we offer diodes being packaged in a TO46-can, equipped with a miniature thermoelectric element.