Multiwavelength Laser Module Based on Distribute Feedback Laser Diode for Broadcast and Communication Systems

Multiwavelength Modelocked Semiconductor Diode Laser

External cavity multiwavelength superbroadband diode laser

Multiwavelength semiconductor laser source for dense wavelength division multiplexing (DWDM) applications based on a novel dispersive cavity is described. Multiline lasing on the basis of a single-diode laser chip and multi-stripe diode laser is analyzed theoretically and demonstrated experimentally. Simultaneous lasing across 80% of the FWHM of the luminescence bandwidth of the AlGaAs active m...

Laser vibrometer based on optical-feedback-induced frequency modulation of a single-mode laser diode.

We describe a sensitive and inexpensive vibrometer based on optical feedback by diffuse scattering to a single-mode diode laser. Fluctuations in the diode laser's operating frequency that are due to scattered light from a vibrating surface are used to detect the amplitude and frequency of surface vibrations. An additional physical vibration of the laser provides an absolute amplitude calibratio...

DFB Laser Diode Dynamics with Optoelectronic Feedback

Using of Broadened Asymmetric Waveguide Structure for 980nm Diode Laser

Laser diode beam divergence is the main parameter for beam shaping and fiber optic coupling. Increasing the waveguide layer thickness is the conventional method to decrease the beam divergence. In this paper, the broadened asymmetric waveguide is introduced to decrease the divergence without increasing the optical power. The asymmetric waveguide was used to shift the vertical optical field to n...