title: 400 mW external cavity diode laser with narrowband emission at 445 nm.
abstract: A high-power external cavity diode laser (ECDL) system with narrowband emission is presented. The system is based on a commercially available high-power GaN laser diode. For the ECDL, a maximum optical output power of 400 mW in continuous-wave operation with narrowband emission is achieved. Longitudinal mode selection is realized by using a surface diffraction grating in Littrow configuration. A spectral width of 20 pm at 445 nm with a side-mode suppression ratio larger than 40 dB is achieved. This concept enables diode laser systems suitable for subsequent nonlinear frequency conversion into the UV spectral range.
authors: N
authors: N
authors: Ruhnke
authors: A
authors: A
authors: Müller
authors: B
authors: B
authors: Eppich
authors: M
authors: M
authors: Maiwald
authors: B
authors: B
authors: Sumpf
authors: G
authors: G
authors: Erbert
authors: G
authors: G
authors: Tränkle