Tunable external-cavity diode laser at 650 nm based on a transmission diffraction grating.
A tunable external-cavity diode laser (ECDL) based on a transmission diffraction grating in a Littrow mount has been developed and characterized. A single-transverse-mode diode laser at 650 nm is used in an external-cavity configuration in which the transmission grating is used as a dispersive element to select the single longitudinal mode. The transmission diffraction grating is made with electron-beam lithography. A tunable true single-mode cw output power of >20 mW is obtained from the ECDL. The total wavelength tuning range is 12 nm, and the mode-hop-free continuous tunability is >20 GHz.
Laurila
Toni
T
Institute of Physics, Optics Laboratory, Tampere University of Technology, Finland. toni.laurila@tut.fi
Joutsenoja
Timo
T
Hernberg
Rolf
R
Kuittinen
Markku
M