نتایج جستجو برای: distributed feedback lasers

تعداد نتایج: 429216  

2010
Gabriele Bolognini Marcelo A Soto Fabrizio Di Pasquale

An investigation is performed of the possibility of achieving simultaneous distributed strain and temperature sensing based on hybrid Raman–Brillouin scattering with the use of multi-wavelength optical sources such as common Fabry–Perot (FP) lasers. By employing a self-heterodyne detection scheme based on a multi-wavelength optical local oscillator, the benefits of FP lasers are fully exploited...

2013
LUKE LESTER Luke F. Lester Ravi Raghunathan Jesse Mee Antonio Hurtado

three different nanostructured semiconductor lasers were studied – the quantum dot passively mode-locked laser, the dual-mode quantum dot laser and the optically-injected quantum dot distributed feedback laser. The key milestones achieved were: 1) the use of optical feedback to reduce the timing jitter of the pulsed lasers from 295 fs/cycle to 32 fs/cycle, 2) experimental determination of the o...

Journal: :CoRR 2012
Abdelkarim Moumen Abdelkarim Zatni Abdelhamid Elkaaouachi Abdenabi Elyamani Hamza Bousseta

A numerical investigation on the dynamic large-signal analysis using a time-domain traveling wave model of quarter wave-shifted distributed feedback semiconductor lasers diode with a Gaussian distribution of the coupling coefficient (GDCC) is presented. It is found that the single-mode behavior and the more hole-burning effect corrections of quarter wave-shifted distributed feedback laser with ...

Journal: :Optics express 2008
Erwin K Lau Xiaoxue Zhao Hyuk-Kee Sung Devang Parekh Connie Chang-Hasnain Ming C Wu

By using strong optical injection locking, we report resonance frequency enhancement in excess of 100 GHz in semiconductor lasers. We demonstrate this enhancement in both distributed feedback (DFB) lasers and vertical-cavity surface-emitting lasers (VCSELs), showing the broad applicability of the technique and that the coupling Q is the figure-of-merit for resonance frequency enhancement. We ha...

2016
Louise Jumpertz Kevin Schires Mathieu Carras Marc Sciamanna Frédéric Grillot

The onset of nonlinear dynamics and chaos is evidenced in a mid-infrared distributed feedback quantum cascade laser both in the temporal and frequency domains. As opposed to the commonly observed route to chaos in semiconductor lasers, which involves undamping of the laser relaxation oscillations, quantum cascade lasers first exhibit regular self-pulsation at the external cavity frequency befor...

Journal: :Optics express 2013
Srikanth Sugavanam Nikita Tarasov Xuewen Shu Dmitry V Churkin

Narrow-band emission of spectral width down to ~0.05 nm line-width is achieved in the random distributed feedback fiber laser employing narrow-band fiber Bragg grating or fiber Fabry-Perot interferometer filters. The observed line-width is ~10 times less than line-width of other demonstrated up to date random distributed feedback fiber lasers. The random DFB laser with Fabry-Perot interferomete...

Journal: :ACS Nano 2021

Plasmonic modes in optical cavities can be amplified through stimulated emission. Using this effect, plasmonic lasers potentially provide chip-integrated sources of coherent surface plasmon polaritons (SPPs). However, while have been experimentally demonstrated, they not generated propagating plasmons as their primary output signal. Instead, typically involve significant emission free-space pho...

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