With a wavelength at 400nm, this module is made to produce a long coherent length, stable wavelength with long lifetime and easy operating, which is widely used in holography, interference, fluorescence, photoetching, flow cytometry, DNA sequencing, Raman spectroscopy . With a wavelength at 400nm, this module is made to produce a long coherent length, stable wavelength with long lifetime and easy operating, which is widely used in holography, interference, fluorescence, photoetching, flow cytometry, DNA sequencing, Raman spectroscopy . Long coherent length diode laser module from CNI Laser. SEM (scanning electron microscope) image of a commercial laser diode with its case and window cut away. The anode connection on the right has been accidentally broken by the case cut. The LRD-0400 Series of Collimated Diode (Semiconductor) Lasers are ideal for applications requiring a short wavelength of 400 nm and output power levels from 5 mW to 300 mW with a high level of long-term output power stability. It works on the same basic principle as an LED, but with an internal structure that forces photons to align in phase and direction, producing coherent laser light instead of the. 400nm 30mW single mode pigtailed diode laser module is engineered with a 3um single mode fiber, ensuring the generation of a Gaussian Beam, housed in a coaxial package, it boasts a compact form factor, an integrated photodiode (PD), and the option for a thermoelectric cooler (TE Cooler). This 400nm. A laser diode is a semiconductor device that emits coherent light through the process of stimulated emission. The emitted light waves have the same wavelength, frequency, and.