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Appl Opt. 2002 Sep 20;41(27):5632-7.

Tunable external-cavity diode laser at 650 nm based on a transmission diffraction grating.

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  • 1Institute of Physics, Optics Laboratory, Tampere University of Technology, Finland.


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.

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