Introduction: Wholesale slender linewidth diode laser modules retain spectral linewidth below 0.one nm and thermal drift in close proximity to 0.01 nm/°C for stable, exact operation in variable environments.
As the https://www.reallightlaser.com/cw-qcw-lasers/08ltr-mini-single-mode-free-space-narrow-linewidth-diode-laser-components/