Results 21 to 30 of about 3,742 (297)
RF or THz signals generated from DC biased multimode lasers [PDF]
, 2007 Although self pulsating (SP) lasers are DC biased, they feature a modulation of the output power. For the results presented in this paper, the SP frequency corresponds to the frequency spacing between longitudinal modes or its second harmonic.
Frederic Surre +5 more
core +1 more source
Virtual cavity in distributed Bragg reflectors
Optics Express, 2018 We show theoretically and experimentally that distributed Bragg reflector (DBR) supports a surface electromagnetic wave exhibiting evanescent decay in the air and oscillatory decay in the DBR. The wave exists in TM polarization only. The field extension in the air may reach several wavelengths of light.
V. A. Shchukin +13 more
openaire +2 more sources
Applied Sciences, 2019 A multiple quantum-well semiconductor saturable absorber mirror (MQW-SESAM) structure has been investigated by femtosecond pump-probe laser spectroscopy at a central wavelength of around 1050 nm.
Changxiu Li +4 more
doaj +1 more source
Distributed Bragg reflector lasers emitting between 696 and 712 nm
Electronics Letters, 2022 The authors report on design, fabrication, and electro‐optical characterization of single‐frequency diode lasers emitting around 696, 707, and 712 nm.
Hans Wenzel +9 more
doaj +1 more source
Micromachines, 2022 Electromagnetic (EM) absorbers and emitters have attracted much interest because of their versatile applications. A photonic heterostructure composed of silicon carbide (SiC) layer/germanium (Ge) cavity/distributed Bragg reflector (DBR) has been proposed.
Chengxuan Gong, Gaige Zheng
doaj +1 more source
Modelocked distributed Bragg reflector laser
Electronics Letters, 1999 The fabrication and performance of a modelocked distributed Bragg reflector laser is described. The laser has a threshold current of 60 mA and differential efficiency of 0.05 mW/mA when coupled into a singlemode fibre. Modelocked pulses with 7 ps pulsewidth, with a time-bandwidth (/spl Delta/t/spl Delta//spl nu/) product of /spl sim/0.7, at /spl sim/5 ...
H. Fan +4 more
openaire +2 more sources
IEEE Photonics Journal, 2018 We demonstrate a distributed reflector (DR) laser with the distributed feedback (DFB) section and the distributed Bragg reflector (DBR) section sharing the same multiple-quantum-well structure.
Yuanfeng Mao +9 more
doaj +1 more source
Multi-Frequency Doppler Velocimetry Based on a Mode-Locked Distributed Bragg Reflector Laser
Photonics, 2023 A differential multi-frequency laser Doppler velocimetry is demonstrated, utilizing the synchronized multimode of a mode-locked distributed Bragg reflector laser.
Hao Song +5 more
doaj +1 more source
Passively mode-locked semiconductor lasers and their applications [PDF]
, 2008 In this paper we present some characterizations of passively mode-locked semiconductor lasers. These lasers are multimode and they exhibit a modulation of their output power even though they are DC-biased.
Frederic Surre +5 more
core +1 more source
Porous AlGaN-Based Ultraviolet Distributed Bragg Reflectors [PDF]
Materials, 2018 Utilising dislocation-related vertical etching channels in gallium nitride, we have previously demonstrated a simple electrochemical etching (ECE) process that can create layered porous GaN structures to form distributed Bragg reflectors for visible light at wafer scale. Here, we apply the same ECE process to realise AlGaN-based ultraviolet distributed
Griffin, Peter +2 more
openaire +3 more sources