title: Monolithically integrated 2.5  GHz extended cavity mode-locked ring laser with intracavity phase modulators.
abstract: A mode-locked extended cavity quantum well ring laser at 1.58 μm with a repetition rate of 2.5 GHz in the form of a photonic integrated circuit is presented. The device is realized using InP-based active-passive integration technology. The 33 mm long cavity contains gain, saturable absorption, and passive waveguide sections as well as phase shifter sections to enable fine tuning of the spectral position of the lasing modes. Passive and hybrid mode-locked operation, along with the wavelength tuning of the laser modes, are experimentally demonstrated. In the passive mode-locking regime, a beat signal at the fundamental round trip frequency with a 3 dB bandwidth of 6.1 kHz is produced on a fast photo diode.
authors.forename: Sylwester
authors.initials: S
authors.lastname: Latkowski
authors.forename: Valentina
authors.initials: V
authors.lastname: Moskalenko
authors.forename: Saeed
authors.initials: S
authors.lastname: Tahvili
authors.forename: Luc
authors.initials: L
authors.lastname: Augustin
authors.forename: Meint
authors.initials: M
authors.lastname: Smit
authors.forename: Kevin
authors.initials: K
authors.lastname: Williams
authors.forename: Erwin
authors.initials: E
authors.lastname: Bente