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Showing 1 to 20 of 118 for “"Surface-emitting"”.
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Vertical cavity surface emitting lasers.
Vertical cavity surface emitting laser (VCSEL) structures have been grown by both metal-organic chemical vapour deposition (MOCVD) and molecular beam epitaxy (MBE). These incorporate 3 strained InGaAs / GaAs quantum wells placed resonantly in a two wavelength long optical cavity, formed between …
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Metal-cavity surface-emitting nanolasers
Metal-cavity surface-emitting micro/nanolasers are proposed and demonstrated. The design uses metals as both the cavity sidewall and the top/bottom reflectors and maintains the surface-emitting nature. As a result of the large permittivity contrast between the dielectric and metal, the optical …
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Mode-locked surface emitting semiconductor lasers
Optically-Pumped Vertical External Cavity Surface Emitting Lasers (OP-VECSELs) arc novel semiconductor-based lasers that have many advantages over other lasers in terms of the power scalability, good beam quality, compactness and low cost they can offer. They can be passively mode-locked with a …
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Dielectric micro-cavity surface-emitting lasers
… pumping or at 77 K, except for the metal-cavity surface-emitting laser structure that came out from our group in 2010. In this thesis, the metallic cavity sidewalls in the previous design were replaced by dielectric material to reduce extra metal loss. Both theoretical and experimental studies on …
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Femtosecond pulse generation in surface-emitting semiconductor lasers
… optically pumped vertical external-cavity surface-emitting lasers (VECSELs). Continuous wave VECSELs were first designed as a type of semiconductor laser capable of producing high output power in near transform-limited beams. Optical pumping allows the output power of the device to be …
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Gallium Arsenide based photonic crystal surface emitting lasers
Photonic crystal surface emitting lasers (PCSELs) are an emerging class of semiconductor laser which incorporate a 2D photonic crystal into a semiconductor laser structure to provide large area 2D feedback and surface emission. These devices have a number of desirable properties, chief of which is …
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Numerical Simulation of Vertical Cavity Surface Emitting Lasers
… to the growing importance of vertical cavity surface emitting lasers (VCSELs), the semiconductor laser simulator Minilase has been extended to allow simulation of VCSEL devices. The fundamental physics of VCSELs are no different from the physics of other semiconductor lasers; however, the …
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High-power single-mode vertical-cavity surface-emitting lasers
Since their invention in 1979, vertical-cavity surface-emitting lasers (VCSELs) have been the focus of many research efforts due to the wide applicability of so many of their features. Those that operate in the single-mode regime with sufficiently high power are of particular interest because of …
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Direct modulation of multimode vertical cavity surface emitting lasers
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2001.
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A Comprehensive Study of Hybrid Vertical -Cavity Surface -Emitting Lasers
The high frequency modulation response for hybrid VCSELs is measured and compared to the theoretical response of the VCSEL derived through small signal analysis, with good agreement. For the two single mode structure wafers measured, the VCSELs with the implant aperture located farther away from …
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Coupled -Cavity Surface -Emitting Lasers: Modulation Concepts, Performance and Applications
… beyond that of a conventional vertical-cavity surface-emitting laser (VCSEL), and several new device applications for optical communication and signal processing are also discovered. For each modulation concept the modulation characteristics of the CRVCL are studied with rate-equation analysis. …
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Simulating the Modulation Response of Vertical -Cavity Surface -Emitting Lasers
… simulate the dynamic response of vertical-cavity surface-emitting lasers (VCSELs). Various nonlinear gain effects due to carrier transport have been self-consistently accounted for by MINILASE and their important roles in the modulation response are studied and clarified. First, it is demonstrated …
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Static and Dynamic Properties of Vertical -Cavity Surface -Emitting Lasers
Fiber-induced optical feedback is studied by measuring the static properties of an oxide VCSEL as a function of fiber position and correlating the data to theoretical results using a vector mode-matching method which includes the fiber in the modelled structure. A novel method for estimating the …
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Thermal and Optical Simulations of Vertical Cavity Surface Emitting Lasers
… simulator for vertical cavity surface emitting lasers (VCSELs). The lattice temperature model is derived based on carrier transport and the conservation of energy. A novel treatment is applied to model distributed Peltier heat at a heterojunction by use of a Monte Carlo …
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Design and fabrication of vertical external cavity surface-emitting lasers
… design and fabrication of a high output power, surface-emitting laser, known as a vertical external cavity surface-emitting laser (VECSEL). A VECSEL utilizes a free space cavity along with larger transverse cavity dimensions, to extract higher output power. To aid the design of the VECSEL, the …
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Heterogeneously bonded vertical cavity surface emitting lasers and thermal modeling
… consist of different materials for the light emitting region and the substrate. In this dissertation, a post-fabrication bonding technique for integrating semiconductor vertical cavity surface emitting lasers (VCSELs) onto hybrid substrates is demonstrated. This approach provides flexibility …
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Simulating the modulation response of Vertical-Cavity Surface-Emitting lasers
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-23T19:47:36Z No. of bitstreams: 1 liu_yang.pdf: 1056599 bytes, checksum: 919cc5c334cfe8b016ad6c23a3dc7ad7 (MD5)
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Modeling of DFB surface emitting lasers and semiconductor laser arrays
… laser systems, i.e., distributed-feedback (DFB) surface emitting lasers and semiconductor laser arrays, is presented. The DFB surface emitting lasers can produce stable single-mode outputs even under high bit-rate direct modulation and form two-dimensional laser arrays. A simple and accurate …
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