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Cavity Lasers - DOAJ

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Last Updated: 02 August 2022

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Research on Silicon-Substrate-Integrated Widely Tunable, Narrow Linewidth External Cavity Lasers

Widely tunable, narrowly linewidth external cavity lasers on silicon substrates have many important functions, such as white-light measurement, wavelength division multiplexing schemes, coherent optical communication, and optical fiber sensor technology. Two main device-integrated platforms for producing highly tunable, narrow linewidth external cavity lasers on silicon substrates are explored and compared in detail in this paper, including MRR-integrated structure and MRR-and-MZI-integrated structure of external cavity semiconductor lasers.

Source link: https://doi.org/10.3390/cryst12050674


Hybrid external-cavity lasers (ECL) using photonic wire bonds as coupling elements

Abstract: This article explains how to develop chip-scale external-cavity lasers with low-loss silicon or silicon-nitride photonic integrated circuits on direct-bandgap IIIu2013V substrates that have small optical linewidths. We present a new breed of hybrid ECL in this paper by using 3D-printed photonic wire bonds as intra-cavity coupling elements. We use an InP-based reflective SOA alongside a silicon photonic external feedback circuit to demonstrate a single-mode tuning range from 1515 to 1565 nm in a proof-of-concept experiment, from 40 to 1565 nm, with side mode suppression ratios below 40 dB and intrinsic linewidths down to 105 kHz. Integration solutions based on a variety of integration technologies can be combined with monolithic integration's scalability and portability of hybrid multi-chip assemblies, paving the way toward integrated ECL on a number of integration platforms.

Source link: https://doi.org/10.1038/s41598-021-95981-w


Analytical Models for External Cavity Lasers Using Tunable Etalons

External-cavity tunable lasers have been increasingly used in WDM systems for their outstanding features, including high side-mode suppression ratio, low relative intensity noise, and narrow line width. We analyzed the effects of different end-facet reflectivity on the SMSR, PI curves, electron, and photon concentration distributions by numerically solving the model based on the rate equation and the transmission matrix.

Source link: https://doi.org/10.1109/JPHOT.2022.3185456


Self-Seeded RSOA-Fiber Cavity Lasers vs. ASE Spectrum-Sliced or Externally Seeded Transmitters—A Comparative Study

Reflective semiconductor optical amplifier fiber cavity lasers are popular, colorless, self-seeded, self-tuning, and cost-effective upstream transmitters. Reflective semiconductor fiber cavity lasers are widely available, colorless, self-seeded, self-tuning, and cost-effective upstream transmitters. An RSOA-FCL delivers a higher output power than an ASE spectrum-sliced source with SNR, RIN, and frequency response characteristics halfway between an ASE spectrum-sliced and a more expensive externally seeded RSOA. In several cases, the RSOA-FCL is a cost-effective WDM-PON upstream source, borrowing simplicity and cost-efficiency from ASE spectrum slicing with features that are, in some cases, adequate to support short-haul transmission.

Source link: https://doi.org/10.3390/app5041922

* 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