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Showing 1 to 20 of 73 for “"VCSEL"”.

  1. CMOS circuits for VCSEL-based optical IO

    Kern, Alexandra M., 1979-Massachusetts Institute of Technology2007

    … for an input current of 200uA. The presented VCSEL driver operates a standard commercial GaAs VCSEL at 18Gb/s by using pre-emphasis to compensates for the large capacitance and intrinsic optical dynamics of the VCSEL. The driver derives timing information directly from the full-rate input data …

    mit Repository record

  2. Fabrication and characterization of VCSEL based smart pixels

    Pu, Rui, author, Wilmsen, Carl, advisor, Menoni, Carmen, committee member, Leisure, Robert G., committee member, Grigg, Neil S., committee memberColorado State University. Libraries1999

    Vertical-cavity surface-emitting laser (VCSEL)-based smart pixel arrays are very well suited for parallel optoelectronic processing and board-to-board interconnection. The integration of VCSELs with foundry fabricated integrated circuits is the key technology required to fabricate the smart pixels …

    colostate Repository record

  3. High Capacity VCSEL Array Based Optical Wireless Links

    Liu, YiUniversity of Cambridge2023

    … thesis, Vertical-Cavity Surface-Emitting Lasers (VCSEL) are employed in laser-based OWC systems due to their compatible eye-safe working wavelengths within the near-infrared range, lower cost, and easy large-scale two-dimensional chip fabrication compared to other laser sources. The main …

    cambridge Repository record

  4. Advancements in VCSEL technology: transverse mode control and matrix-addressable 2-D arrays

    Gadallah, AbdelsattarUniversität Ulm

    ulm-diss Repository record

  5. Position and velocity sensing measurements using an integrated VCSEL and pin photodetector assembly

    Jefvert, Thomas M.University of Illinois at Urbana-Champaign2011

    Made available in DSpace on 2011-05-25T14:40:31Z (GMT). No. of bitstreams: 2 Jefvert_Thomas.pdf: 7841540 bytes, checksum: 9ef9792a0cc33ab293a45a73dce41a0b (MD5) license.txt: 4064 bytes, checksum: 723d56f6be0d118060f2052c1b59a730 (MD5)

    uiuc Repository record

  6. Characteristics of a cavity soliton laser based on a VCSEL with frequency selective feedback

    Radwell, NealUniversity of Strathclyde2010

    strathclyde Repository record

  7. Signal modulation and relative intensity noise properties of transistor laser and nano-cavity VCSEL

    Tan, FeiUniversity of Illinois at Urbana-Champaign2014

    … and laser RIN from the investigation of VCSELs. We have demonstrated the small cavity oxide confined 850 nm VCSEL with ultra-low laser RIN and 40 Gb/s error-free data transmission. By shrinking the optical modal dimension further, the laser RIN is reaching the thermal limit. These …

    uiuc Repository record

  8. Vertical-cavity surface-emitting laser (VCSEL) for 50Gb/s NRZ optical link in data center

    Fu, WenningUniversity of Illinois at Urbana-Champaign2019

    … Vertical-cavity Surface-Emitting Lasers (VCSELs) at 850 nm have been widely deployed in optical data transmission as the optical transmitters. However, the data transmission capability of commercial VCSELs used in 100 m optical links with direct non-return-to-zero (NRZ) modulation has been …

    uiuc Repository record

  9. Coherently coupling multiple elements in vertical-cavity surface-emitting laser arrays

    Thompson, Bradley JayUniversity of Illinois at Urbana-Champaign2019

    Vertical-cavity surface-emitting laser (VCSEL) arrays with three or more emitters coherently coupled are the focus of this work. VCSEL arrays have many established applications and reliable coherent VCSEL arrays are a next step in their progression. The key innovation of this work is individual …

    uiuc Repository record

  10. Semiconductor Laser Device-Level Characteristics

    Law, Clement K2011

    … of the Vertical Cavity Surface Emitting Laser (VCSEL), Distributed Feedback (DFB), and Fabry-Pérot (FP) lasers. The measurements of the DC characteristics are optical power versus drive current (L-I) curves (DFB, VCSEL) and optical spectra (FP, DFB, VCSEL). In addition, the high-speed optical …

    calpoly Repository record

  11. Numerical Simulation of Vertical Cavity Surface Emitting Lasers

    Klein, Benjamin D.B.University of Illinois at Urbana-Champaign2015

    … 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 approximation of a closed …

    uiuc Repository record

  12. Coherent laser arrays from bottom-surface vertical-cavity surface-emitting lasers

    Thompson, Bradley JUniversity of Illinois at Urbana-Champaign2015

    Vertical-cavity surface-emitting lasers (VCSELs) are among the best choices for high beam quality semiconductor lasers. By designing a VCSEL array for uniform current injection and having the output coupler on the substrate side of the laser cavity, the laser will more easily operate in the …

    uiuc Repository record

  13. Heterogeneously bonded vertical cavity surface emitting lasers and thermal modeling

    Jeong, HyejinUniversity of Illinois at Urbana-Champaign2014

    … vertical cavity surface emitting lasers (VCSELs) onto hybrid substrates is demonstrated. This approach provides flexibility regarding the choice of device fabrication and hybrid substrate materials. Light output versus injected current and applied voltage characteristics of lasers are …

    uiuc Repository record

  14. A Comprehensive Study of Hybrid Vertical -Cavity Surface -Emitting Lasers

    Young, Erik WilliamUniversity of Illinois at Urbana-Champaign2015

    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 …

    uiuc Repository record

  15. Design and fabrication of vertical external cavity surface-emitting lasers

    Ragunathan, GauthamUniversity of Illinois at Urbana-Champaign2014

    … of vertical-cavity surface-emitting lasers (VCSELs). After the structure and operation of a VCSEL is overviewed, the fabrication of an oxide-confined VCSEL will be detailed. The VCSEL wafers’ epitaxial structures have a variation in their doping concentration profile in the p-type distributed …

    uiuc Repository record

  16. Coherently-coupled vertical-cavity laser arrays

    Johnson, MatthewUniversity of Illinois at Urbana-Champaign2014

    … vertical cavity surface-emitting laser (VCSEL) arrays offer a unique approach to beam steering and high-radiance applications, and have many advantages such as small size, low cost, high speed, durability and manufacturing ease. Previous work on coherently-coupled VCSEL arrays has left …

    uiuc Repository record

  17. Modulation of coherently coupled surface-emitting laser arrays: analysis and applications

    Fryslie, Stewart TUniversity of Illinois at Urbana-Champaign2017

    Vertical-cavity surface-emitting lasers (VCSELs) have become the dominant source for optical data communication links in computer server, data center, and super computer applications. Driven by the exponential increase of performance in information technology, data centers, and computational power, …

    uiuc Repository record

  18. Development of high speed vertical cavity surface-emitting semiconductor diode laser and transistor laser

    Liu, Michael EUniversity of Illinois at Urbana-Champaign2016

    … vertical cavity surface-emitting laser (VCSEL) is able to show a high modulation bandwidth as well as single-mode operation; however, because of the small oxide aperture (< 3 µm), a microcavity VCSEL shows high resistance and low optical power. An 850 nm oxide-confined VCSEL with an …

    uiuc Repository record

  19. Static and Dynamic Properties of Vertical -Cavity Surface -Emitting Lasers

    Hsu, AlanUniversity of Illinois at Urbana-Champaign2015

    … 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 linewidth enhancement factor in VCSELs is …

    uiuc Repository record

  20. Non-Hermitian aspects of coherently coupled vertical cavity laser arrays

    Gao, ZiheUniversity of Illinois at Urbana-Champaign2018

    … isolated vertical cavity surface emitting laser (VCSEL) arrays have been studied both theoretically and experimentally. Because of the tunable gain/loss profile in the array, the coupled laser system is non-Hermitian in analogy with non-Hermitian quantum mechanics. The experimentally observed …

    uiuc Repository record

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