title: High beam quality in two directions and high efficiency output of a diode laser array by spectral-beam-combining.
abstract: Improvement is made in the traditional spectral beam combining structure by adding beam shaping element, namely Beam Transformation System (BTS). Spectral beam combination is performed in a horizontal direction by the external cavity after beam shaping. The effect of smile and the divergence of the slow axis are reduced. A standard semiconductor laser array is used in this experiment. A CW output power of 58.8 W and an electro-optic conversion efficiency of 51% are achieved. The spectral line-width is 12.7 nm. M(2) of 1.3 × 11.6 in horizontal and vertical directions are obtained. The beam quality of the output is close to that of a single emitter of the array in two directions.
authors.forename: Zhanda
authors.initials: Z
authors.lastname: Zhu
authors.forename: Long
authors.initials: L
authors.lastname: Gou
authors.forename: Menghua
authors.initials: M
authors.lastname: Jiang
authors.forename: Yongling
authors.initials: Y
authors.lastname: Hui
authors.forename: Hong
authors.initials: H
authors.lastname: Lei
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li