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Coupled Wave Analysis of Two-Dimensional Second Order Surface-Emitting Distributed Feedback Lasers

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2016, Master of Science (M.S.), University of Dayton, Electro-Optics.
A distributed feedback laser (DFB) is a type of semiconductor laser where the cavity is periodically structured as a diffraction grating. This allows the same grating region to act as a resonator, out-coupler and the gain region simultaneously. While conventional DFB lasers emit light along its edges, by modifying the grating structure, it is possible to make the output appear from the top surface. This is known as the surface-emitting DFB laser. This thesis will discuss the case in which a two-dimensional grating (which consists of a 2D grid of holes or pillars) etched into the top cladding surface of the waveguide. The thesis consists of four main parts. For the first part, we give the background principles and the coupled wave equations with radiation modes. In the second part, we derive the equations for a waveguide that utilizes a grating strip for guidance. The effective index of this guide is then used in the 2D DFB crossed grating structure. The third part begins with calculations of a particular GaAs:GaAlAs waveguide geometry with a grating. We present the fundamental resonant modes by utilizing the numerical shooting method. Then, the matrix solution method is applied in the calculation of the higher order guided and radiation modes. In the last part, we solve the transcendental equations for the eigenvalues to get the threshold gain and near field radiation pattern from the DFB surface.
Sarangan Andrew (Committee Chair)
Banerjee Partha (Committee Member)
Qiwen Zhan (Committee Member)
51 p.

Recommended Citations

Citations

  • Shen, Y. (2016). Coupled Wave Analysis of Two-Dimensional Second Order Surface-Emitting Distributed Feedback Lasers [Master's thesis, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461713975

    APA Style (7th edition)

  • Shen, Yangfei. Coupled Wave Analysis of Two-Dimensional Second Order Surface-Emitting Distributed Feedback Lasers. 2016. University of Dayton, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461713975.

    MLA Style (8th edition)

  • Shen, Yangfei. "Coupled Wave Analysis of Two-Dimensional Second Order Surface-Emitting Distributed Feedback Lasers." Master's thesis, University of Dayton, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1461713975

    Chicago Manual of Style (17th edition)