We consider a mode-locked (ML) quantum-dot (QD) edge-emitting semiconductor laser consisting of a reverse-biased saturable absorber and a forward-biased amplifying section. To describe the dynamics of ...

A novel widely tunable laser diode is proposed and demonstrated. Mode selection occurs by etching perturbing slots into the laser ridge. A two-section device is realized with different slot patterns ...

A team of researchers has developed a novel method for using cholesteric liquid crystals in optical microcavities. The ...

The Mamyshev oscillator (MO) is a type of fiber laser capable of producing high-energy laser pulses at a tunable repetition ...

Laser-assisted materials fabrication is an advanced technique that has propelled recent carbon synthesis approaches. Direct laser writing on polyimide or lignocellulose materials by a CO2 laser has ...

In a recent study, published in Advanced Photonics Nexus , researchers presented an innovative ultranarrow bandwidth mode-locked laser with a tunable pulse bandwidth. "We have successfully developed ...

Through this strategy, they achieved a wide tunable range from 481 ps to 1.38 ns. This almost 1 ns tuning range is the largest ever reported for a narrow-bandwidth passively mode-locked laser.

More information: Weixi Li et al, Pulse duration tunable ultra-narrow bandwidth mode-locked lasers, Advanced Photonics Nexus (2025). DOI: 10.1117/1.APN.4.3.036016 ...

Narrow-bandwidth mode-locked lasers have potential benefits in many fields, including diamond cutting and semiconductor manufacturing. However, currently they have fixed, rigid pulse duration ...

A general acid vapor oxidation (AVO) strategy has been developed to grow highly oriented hierarchically structured rutile TiO2 nanoarrays with tunable morphologies from titanium thin films. This is a ...