(PDF) Sampled grating terahertz quantum cascade lasers- terahertz quantum cascade lasers with sampled lateral gratings for single mode operation ,With sampled grating technology, the single-mode peak power of 186 mW is realized in a pulsed operation at 10 K, which is approximately 1.35 times that of the uniform grating laser. Terahertz quantum-cascade lasers with lateral distributed ...Terahertz quantum-cascade lasers (THz QCLs) are promising far-infrared sources for various applications such as local oscillators in heterodyne detectors. This requires a combination of sufficient output power, continuous-wave (cw) operation in small-sized cryocoolers, and single-mode emission at the specified target frequency. Obtaining such a combined goal requires a suitable QCL ...
This chapter is dedicated to terahertz (THz) quantum cascade laser technology. After a brief introduction that contains a description of the current state of the art in terms of performance, the following important technological aspects are reviewed in more detail: waveguide and photonic structures, frequency and phase stabilisation, and active mode-locking.
Abstract and Figures We report on terahertz quantum-cascade lasers (THz QCLs) based on first-order lateral distributed-feedback (lDFB) gratings, which exhibit continuous-wave operation, high output...
Terahertz quantum-cascade lasers (THz QCLs) are promising far-infrared sources for various applications such as local oscillators in heterodyne detectors. This requires a combination of sufficient output power, continuous-wave (cw) operation in small-sized cryocoolers, and single-mode emission at the specified target frequency.
In the meanwhile, the same emission direction and strong spatial overlap of the beams may result in the loss of flexibility for external beam shaping. In this work, we present a compact lens-coupled THz QCL array with multiple spatially-separated beams. The single-chip array consists of six lasers with buried sampled gratings.
关DOI: 10.1063/1.1883332兴 The dynamic development of midinfrared 共MIR兲 quan- The QCL material used for this work is described in tum cascade lasers 共QCLs兲 gave rise to a variety of powerful detail as Sample 2 in Ref. 14 and consists of a coherent emitters.
Single-mode surface-emitting concentric-circular-grating terahertz quantum cascade lasers Appl. Phys. Lett. 102, 031119 (2013); 10.1063/1.4789535 Directional single mode quantum cascade laser emission using second-order metal grating coupler Appl. Phys. Lett. 98, 021101 (2011); 10.1063/1.3535610
Terahertz quantum cascade lasers with sampled lateral gratings for single mode operation Dixiang SHAO, Chen YAO, Zhanglong FU, Wenjian WAN, Ziping LI, and Juncheng CAO * Author Affiliations
Abstract: We report on terahertz quantum-cascade lasers (THz QCLs) based on first-order lateral distributed-feedback (lDFB) gratings, which exhibit continuous-wave operation, high output powers ( > 8 mW), and
Terahertz (THz) frequency quantum cascade lasers emitting peak powers of >1 W from a single facet in the pulsed mode are demonstrated. The active region is based on a bound-to-continuum transition with a one-well injector, and is embedded into a surface-plasmon waveguide.
Abstract: We report on terahertz quantum-cascade lasers (THz QCLs) based on first-order lateral distributed-feedback (lDFB) gratings, which exhibit continuous-wave operation, high output powers (>8 mW), and single-mode emission at 3.3–3.4 THz. A general method is presented to determine the coupling coefficients of lateral gratings in terms ...
The dynamical tuning due to rear facet illumination of single-mode, terahertz (THz) quantum-cascade lasers (QCLs) which employ distributed feedback gratings are compared to the tuning of single-mode QCLs based on two-section cavities. The THz QCLs under investigation emit in the range of 3 to 4.7 THz.
We demonstrate a metal-stripe sampled Bragg grating distributed feedback terahertz quantum cascade laser for power scaling up along with reliable single-mode emission. The major advantage is that the effective coupling coefficient can be flexibly engineered by tuning the sampling duty cycle. With sampled grating technology, the single-mode peak ...
A periodic array of thin slits opened on a metallic surface can act as a one-dimensional photonic crystal for the propagation of surface-plasmon waves. We have used such structure for the implementation of distributed feedback resonators in quantum cascade lasers emitting near 2.5THz. Single-mode emission, stable at all injection currents and operating temperatures, was achieved both in pulsed ...
We report on terahertz quantum-cascade lasers (THz QCLs) based on first-order lateral distributed-feedback (lDFB) gratings, which exhibit continuous-wave operation, high output powers (>8 mW), and ...
Article. Single-mode tapered terahertz quantum cascade lasers with lateral gratings. May 2016; Solid-State Electronics 122 122
We have used such structure for the implementation of distributed feedback resonators in quantum cascade lasers emitting near 2.5 THz. Single-mode emission, stable at all injection currents and operating temperatures, was achieved both in pulsed and continuous wave.
Abstract: We report on terahertz quantum-cascade lasers (THz QCLs) based on first-order lateral distributed-feedback (lDFB) gratings, which exhibit continuous-wave operation, high output powers ( > 8 mW), and
In this paper, we presented single mode terahertz quantum cascade lasers (THz QCLs) with sampled lateral grating emitting approximately 3.4 THz. Due to strong mode selection, the implementation of sampled lateral grating on THz QCL ridges can result in stable single longitudinal mode emission with a side-mode suppression ratio larger than 20 dB.
terahertz quantum cascade lasers (THz QCLs) with sampled lateral grating emitting approximately 3.4 THz. Due to strong mode selection, the implementation of sampled lateral grating on THz QCL ridges can result in stable single longitudinal mode emission with a side-mode suppression ratio larger than 20 dB. The measured peak
In this paper, we presented single mode terahertz quantum cascade lasers (THz QCLs) with sampled lateral grating emitting approximately 3.4 THz. Due to strong mode selection, the implementation of sampled lateral grating on THz QCL ridges can result in stable single longitudinal mode emission with a side-mode suppression ratio larger than 20 dB. The measured peak power of the grating laser is ...
Single-mode THz quantum cascade laser Distributed feedback (DFB) is a reliable compact approach in THz QCL to realize coherent single-mode emission. For various applications such as THz spectroscopy, wireless communication, and remote sensing technology, good emission characteristics of not only stable single-mode, but also high output power ...
Here, the authors seed a quantum cascade laser with coherent terahertz pulses, forcing laser action to start on a fixed phase. This kind of laser could be used as a source in time-domain spectroscopy.
Tapered terahertz quantum cascade lasers with lateral gratings have been designed and fabricated. • The proposed device exhibits low lateral divergence and single-mode operation. • The proposed device also has advantage of easy fabrication.
Terahertz quantum cascade lasers (THz QCLs) are the most powerful solid-state THz sources so far and THz QCLs with various distributed feedback (DFB) gratings have demonstrated single-mode ...
