VI Systems published the results of testing of the prototype manufacturing of its diode laser which emits in the yellow-orange spectral range (599 – 605 nm wavelength) in Optics Express. Target applications for the yellow-orange laser diode include medical use, industrial spectroscopic analysis, and an ultra-high precision optical atomic clock.
The company demonstrated the lasing in the yellow-orange spectral range from 599 – 605 nm at room temperature in a laboratory environment. The device is single mode in the vertical direction (fast axis and the full width at half maximum (FWHM) in the slow axis was measured at a lateral angle of 24° for a diode laser of 1mm length). In pulsed mode operation at 40 kHz, the device achieves an average power level of 1mW.
The company points out that commercially available lasers of this spectral range usually use frequency doubling of the laser light from an infrared laser diode with a nonlinear crystal. However, a diode laser can be used for industrial spectroscopic analysis, medical applications, and an ultra-high precision optical atomic clock.
N. N. Ledentsov, V. A. Shchukin, Yu. M. Shernyakov, et al. 2018. Room-temperature yellow-orange (In,Ga,Al)P–GaP laser diodes grown on (n11) GaAs substrates. Optics Express 26(11) 13985-13994. https://doi.org/10.1364/OE.26.013985