Extended cavity quantum cascade laser with cavity resonator integrated grating filter

Broadly Tunable External Cavity Quantum Cascade Laser Development

Dynamics of a vertical cavity quantum cascade phonon laser structure

Driven primarily by scientific curiosity, but also by the potential applications of intense sources of coherent sound, researchers have targeted the phonon laser (saser) since the invention of the optical laser over 50 years ago. Here we fabricate a vertical cavity structure designed to operate as a saser oscillator device at a frequency of 325 GHz. It is based on a semiconductor superlattice g...

Monolithically Integrated 1GHz Extended Cavity Linear Mode-Locked Laser

We report a monolithically integrated 42 mm long cavity linear mode-locked laser at 1541 nm, with a low repetition rate at 1 GHz. The device uses InP-based active-passive integration technology and integrated multimode interference reflectors. Passive (PML) and hybrid mode-locked (HML) regime operation are experimentally demonstrated. The device exhibits a very narrow RF linewidth of the beat n...

Quantum cascade laser-based integrated cavity output spectroscopy of exhaled nitric oxide

A nitric oxide (NO) sensor employing a thermoelectrically cooled, continuous-wave, distributed feedback quantum cascade laser operating at 5.47 μm (1828 cm−1) and off-axis integrated cavity output spectroscopy was used to measure NO concentrations in exhaled breath. A minimum measurable concentration (3σ) of 3.6 parts-per-billion by volume (ppbv) of NO with a data-acquisition time of 4 s was de...

Potential characterization of free-space-wave drop demultiplexer using cavity-resonator-integrated grating input/output coupler.

A prototype free-space-wave drop demultiplexer consisting of a cavity-resonator-integrated grating input/output coupler (CRIGIC) and a different-guided-mode-coupling distributed Bragg reflector (DGM-DBR) was designed for constructing a high-density wavelength-division-multiplexing intra-board chip-to-chip optical interconnection. The CRIGIC consists of one grating coupler and two DBRs, and can ...