High-Power Surface-Emitting Surface-Plasmon-Enhanced Distributed Feedback Quantum Cascade Lasers

Chen, Jianyan; Liu, Junqi; Guo, Weihua; Wang, Tao; Zhang, Jinchuan; Li, Lü; Wang, Lijun; Liu, Fengqi; Wang, Zhanguo

doi:10.1109/lpt.2012.2192724

Cited by 11 publications

(4 citation statements)

References 11 publications

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“…Instead, both facets can be HR coated for substrate-emitting to further decrease the mirror loss since the light is emitted from substrate instead of front facet. Besides, improved far-field distributions can be expected from substrate-emitting QCLs [ 12 , 13 ]. According to our recent work, a substrate-emitting DFB QCL with low threshold power dissipation of 1.27 W at 20 °C was obtained by depositing HR coating on both facets [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Low Power Consumption Substrate-Emitting DFB Quantum Cascade Lasers

et al. 2017

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In the present work, an ultra-low power consumption substrate-emitting distributed feedback (DFB) quantum cascade laser (QCL) was developed. The continuous-wave (CW) threshold power dissipation is reduced to 0.43 W at 25 °C by shortening the cavity length to 0.5 mm and depositing high-reflectivity (HR) coating on both facets. As far as we know, this is the recorded threshold power dissipation of QCLs in the same conditions. Single-mode emission was achieved by employing a buried second-order grating. Mode-hop free emission can be observed within a wide temperature range from 15 to 105 °C in CW mode. The divergence angles are 22.5o and 1.94o in the ridge-width direction and cavity-length direction, respectively. The maximum optical power in CW operation was 2.4 mW at 25 °C, which is sufficient to spectroscopy applications.

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Section: Introductionmentioning

confidence: 99%

Low Power Consumption Substrate-Emitting DFB Quantum Cascade Lasers

et al. 2017

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“…Traditional IR sources include IR lasers, IR light-emitting diodes (LEDs), and thermal emitters. The IR lasers are of high cost, and the IR LEDs are of low emission intensity in mid-IR range, thus the two kinds of emitters are not the best choice for NDIR gas analysis systems [ 2 , 3 ]. Thermal emitters such as light filaments can meet the requirements of low cost and high emission intensity, but it is difficult to achieve a high modulation frequency that is indispensable for harmonic detection used in IR analysis systems.…”

Section: Introductionmentioning

confidence: 99%

Reliability Design and Electro-Thermal-Optical Simulation of Bridge-Style Infrared Thermal Emitters

et al. 2016

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Designs and simulations of silicon-based micro-electromechanical systems (MEMS) infrared (IR) thermal emitters for gas sensing application are presented. The IR thermal emitter is designed as a bridge-style hotplate (BSH) structure suspended on a silicon frame for realizing a good thermal isolation between hotplate and frame. For investigating the reliability of BSH structure, three kinds of fillet structures were designed in the contact corner between hotplate and frame. A 3-dimensional finite element method (3D-FEM) is used to investigate the electro-thermal, thermal-mechanical, and thermal-optical properties of BSH IR emitter using software COMSOLTM (COMSOL 4.3b, COMSOL Inc., Stockholm, Sweden). The simulation results show that the BSH with oval fillet has the lowest stress distribution and smoothest flows of stress streamlines, while the BSH with square fillet has the highest temperature and stress distribution. The thermal-optical and thermal-response simulations further indicate that the BSH with oval fillet is the optimal design for a reliable IR thermal emitter in spite of having slight inadequacies in emission intensity and modulation bandwidth in comparison with other two structures.

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“…Traditional IR sources include IR lasers, IR light-emitting diodes (LEDs), and thermal emitters. IR lasers are of high cost, and the LEDs are of low emission intensity in mid-IR range, thus these two kinds of emitters are not the best choice for IR spectr oscopy [2][3][4]. Thermal emitters such as light filaments have a broad optical emission spectrum capable of covering multi-wavelength absorptions, which can meet the requirements of low cost and high emission intensity, however it is difficult to achieve a high modulation frequency using these.…”

Section: Introductionmentioning

confidence: 99%

3D-FEM electrical–thermal–mechanical analysis and experiment of Si-based MEMS infrared emitters

Wang

Chen

et al. 2016

J. Micromech. Microeng.

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Designs, simulations, and fabrications of silicon-based MEMS infrared (IR) emitters for gas sensing application are presented. A 3D finite element method (3D-FEM) was used to analyze the coupled electrical–thermal–mechanical properties of a bridge hotplate structure (BHS) IR emitter and closed hotplate structure (CHS) IR emitter using Joule heating and thermal expansion models of COMSOL™. The IR absorptions of n- and p-silicon were calculated for the design of self-heating structure. The BHS and CHS IR emitters were fabricated synchronously using micro-electromechanical systems technology for a direct performance comparison. Both types of IR emitters were characterized by electrical and optical measurements. The experimental results show that BHS IR emitters have higher radiation density, lower power consumption, and faster frequency-response than CHS IR emitters due to the use of a thermal isolation structure and self-heating structure. Meanwhile, the simulated results agree well with the corresponding measured results, which indicate that the 3D-FEM-model is effective and can be used in the optimal design of electro-thermal devices.

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High-Power Surface-Emitting Surface-Plasmon-Enhanced Distributed Feedback Quantum Cascade Lasers

Cited by 11 publications

References 11 publications

Low Power Consumption Substrate-Emitting DFB Quantum Cascade Lasers

Low Power Consumption Substrate-Emitting DFB Quantum Cascade Lasers

Reliability Design and Electro-Thermal-Optical Simulation of Bridge-Style Infrared Thermal Emitters

3D-FEM electrical–thermal–mechanical analysis and experiment of Si-based MEMS infrared emitters

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