The other approach features laser diodes with gratings built into the semiconductor itself: distributed feedback (DFB) and distributed Bragg reflector (DBR) laser diodes.
The grating filter, the semiconductor gain profile, the internal laser diode modes and – if applicable – the external cavity modes determine the lasing mode(s). Precise temperature and current…
Femtosecond Lasers for Ultrafast Studies
View all productsA variety of nonlinear and ultrafast processes can be stimulated and studied using femtosecond lasers
Not long ago, the terahertz frequency range was considered the final frontier of the electromagnetic spectrum. The main reason was the difficulty in generating intense, directional terahertz…