title: Mode stabilization of a laterally structured broad area diode laser using an external volume Bragg grating.
abstract: An external volume Bragg grating (VBG) is used for transverse and longitudinal mode stabilization of a broad area diode laser (BAL) with an on-chip transverse Bragg resonance (TBR) grating. The internal TBR grating defines a transverse low-loss mode at a specific propagation angle inside the BAL. Selection of the TBR mode was realized via the angular geometry of an external resonator assembly consisting of the TBR BAL and a feedback element. A feedback mirror provides near diffraction limited and spectral narrow output in the TBR mode albeit requiring an intricate alignment procedure. If feedback is provided via a VBG, adjustment proves to be far less critical and higher output powers were achieved. Moreover, additional modulation in the far field distribution became discernible allowing for a better study of the TBR concept.
authors.forename: Mario
authors.initials: M
authors.lastname: Niebuhr
authors.forename: Christof
authors.initials: C
authors.lastname: Zink
authors.forename: Andreas
authors.initials: A
authors.lastname: Jechow
authors.forename: Axel
authors.initials: A
authors.lastname: Heuer
authors.forename: Leonid B
authors.initials: LB
authors.lastname: Glebov
authors.forename: Ralf
authors.initials: R
authors.lastname: Menzel