Introduction: Wholesale slender linewidth diode laser modules sustain spectral linewidth less than 0.1 nm and thermal drift around 0.01 nm/°C for secure, specific operation in variable environments.
since the chill of https://www.reallightlaser.com/cw-qcw-lasers/08ltr-mini-single-mode-free-space-narrow-linewidth-diode-laser-components/