title: Continuous-wave operation of a broadly tunable thermoelectrically cooled external cavity quantum-cascade laser.
abstract: Continuous-wave operation of an external cavity quantum-cascade laser on a thermoelectric cooler is reported. The active region of the gain element was based on a bound-to-continuum design emitting near 5.15 microm. The external cavity setup was arranged in a Littrow configuration. The front facet of the gain chip was antireflection coated. The laser could be tuned over more than 170 cm(-1) from 4.94 to 5.4 microm and was single mode over more than 140 cm(-1). The output power was in excess of 10 mW over approximately 100 cm(-1) and in excess of 5 mW over approximately 130 cm(-1) at -30 degrees C.
authors.affiliation: Institute of Physics, University of Neuchâtel, 1 A.-L. Breguet, CH-2000 Neuchâtel, Switzerland. richard.maulini@unine.ch
authors.forename: Richard
authors.initials: R
authors.lastname: Maulini
authors.forename: Dmitri A
authors.initials: DA
authors.lastname: Yarekha
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Bulliard
authors.forename: Marcella
authors.initials: M
authors.lastname: Giovannini
authors.forename: Jérôme
authors.initials: J
authors.lastname: Faist
authors.forename: Emilio
authors.initials: E
authors.lastname: Gini