Coherent has expanded its Sapphire line of compact CW visible lasers with several ultra-narrow linewidth models. The Sapphire SF lasers are available at wavelengths of 488nm and 532nm, and feature single longitudinal output to achieve a linewidth of less than 1.5MHz. They are offered with output powers of 20mW, 50mW, and 100mW at 488nm, and 20mW, 50mW, 100mW and 150mW at 532nm. Independent of wavelength and power class, Sapphire SF lasers are identical in form, fit and function. They provide a high quality, diffraction-limited beam (TEM00, M²<1.1) with excellent pointing stability (<5µrad/°C), high power stability (<2 per cent) and low noise (<0.25 per cent rms from 20Hz to 2MHz).
Coherent Sapphire lasers are based on the company’s optically pumped semiconductor laser (OPSL) technology. These new Sapphire SF lasers are ideal for research and OEM applications that require a narrow spectral linewidth and/or a long coherence length. Primary applications include Raman spectroscopy, Brillouin scattering, holography/stereography, interferometry, metrology, inspection, and remote optical sensing.