Advanced searches left 3/3

Cavity Lasers - Astrophysics Data System

Summarized by Plex Scholar
Last Updated: 02 August 2022

* If you want to update the article please login/register

Strong-feedback regime of self-injection locking and external cavity laser

The laser diode coupling of the laser diode to an external reflector can result in effective suppression of the phase noises and significant stabilization of the laser source. Locking a semiconductor laser to a high-quality-factor microresonator was shown by a laser linewidth narrowing to sub-Hz levels. To get better control and a wider locking band, it's easy to raise the feedback level. Here we develop the more detailed theory of the laser, as well as high feedback levels.

Source link: https://ui.adsabs.harvard.edu/abs/2022SPIE12141E..0KK/abstract


External-cavity laser diode using acousto-optic deflector as tunable grating

In the new configuration, an acousto-optic deflector functions not only as a deflector but also as a diffraction grating. We're glad to report that the wavelengths scanned with the new ECLD match well with theoretical estimation. In addition, reliable measurements of the three-dimensional thickness distribution of a thin glass plate indicate that the ECLD can be used for optical coherence tomography imaging systems.

Source link: https://ui.adsabs.harvard.edu/abs/2022OptL...47.1871S/abstract


Hybrid integrated external cavity laser with a 172-nm tuning range

External cavity lasers have the advantage of a wide tuning range and a narrow linewidth in comparison to distributed feedback lasers and distributed Bragg reflector lasers because the passive filter separated from the gain section can be extensively tuned, and the photon lifetime can be extended thanks to the photon's low-loss external cavity. The bottleneck in getting ultrabroad tuning range for chip-scale ECLs lies in the external cavity's unipressed side modes. Due to the increased lasing mode selection from a tunable Sagnac loop reflector, a record 172-nm wavelength tuning range as well as a more than 40 dB side-mode suppression ratio is achieved beyond the free spectral range of the Vernier ring filter. The Si3 N 4 platform features a low-loss external cavity, allowing laser linewidth reduction below 4 kHz over the full tuning range.

Source link: https://ui.adsabs.harvard.edu/abs/2022APLP....7f6101G/abstract


Dual-wavelength external cavity laser with a sampled grating formed in a silica PLC waveguide for terahertz beat signal generation

A Fabry-Pu00e9rot laser diode is hybrid-integrated with a sampled Bragg grating written in a silica planar lightwave circuit in our project. Two laser wavelengths that share the same laser cavity are available in the grating. Experimental results show that the hybrid-integrated dual-wavelength ECL emits high dual-wavelength emission corresponding to a beat frequency of 1 THz.

Source link: https://ui.adsabs.harvard.edu/abs/2007ApPhB..87..293L/abstract


Photonic crystal L3 cavity laser fabricated using maskless digital photolithography

Projection photolithography is the core technology that has enabled patterning on the scale of a few nanometers that is required for modern electronic chips. Accordingly, a lithographic process for submicron pattern fabrication with high throughput and low cost is in high demand. Using the MDPL technique, we report the development of a PhC L3 cavity laser, which has irregular air holes in terms of their locations and sizes.

Source link: https://ui.adsabs.harvard.edu/abs/2022Nanop..11...21K/abstract

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions