The newest Compass 561 laser from Coherent, Inc. (Santa Clara, CA) delivers 50 mW at 561 nm, while still offering substantially lower noise than any other solid state yellow laser currently available. This frequency doubled, diode-pumped solid state laser has a noise specification of 0.25% rms, from 10 Hz to 1 GHz, as well as excellent beam characteristics (M²<1.2 and beam-pointing stability <6 μrad/°C). In addition, Compass 561 utilizes PermAlign construction to achieve superior reliability and lifetime characteristics, and is backed by a 13 month warranty, with unlimited operating hours.
These performance specifications, together with its compact size of 100 x 40 x 32.5 mm
(3.94 x 1.57 x 1.28 in.), make this new Compass 561 an ideal laser for OEM bioinstrumentation applications, including flow cytometery, confocal microscopy and other types of bioimaging. In particular, the 561 nm output is optimum for exciting several key fluorophores, such as rhodamine series and Alexa Fluor dyes, where it provides better separation between excitation and fluorescence than 532 nm.