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Novel slab-coupled optical waveguide...

Anglin, Kevin.

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Novel slab-coupled optical waveguide laser structures for advancing performance scalability.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Novel slab-coupled optical waveguide laser structures for advancing performance scalability./
作者:	Anglin, Kevin.
面頁冊數:	203 p.
附註:	Source: Dissertation Abstracts International, Volume: 75-07(E), Section: B.
Contained By:	Dissertation Abstracts International75-07B(E).
標題:	Physics. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3580138
ISBN:	9781303882579

Novel slab-coupled optical waveguide laser structures for advancing performance scalability.
Anglin, Kevin.

Novel slab-coupled optical waveguide laser structures for advancing performance scalability. - 203 p.

Source: Dissertation Abstracts International, Volume: 75-07(E), Section: B.

Thesis (Ph.D.)--University of Massachusetts Lowell, 2014.

This item must not be sold to any third party vendors.

Modeling, waveguide modifications, and cavity modifications were developed to significantly improve the performance of 1.06 mum tapered slab-coupled optical waveguide lasers (SCOWLs), and to demonstrate a 1.06 mum folded cavity SCOWL device suitable for creating a high power 2-dimensional SCOWL array technology. Improvement of individual device performance was accomplished by designing 5-mm-cavity-length GaAs-based SCOWLs with adiabatically tapered ridge waveguides. A tailored current-injection profile was used to selectively pump the adiabatically expanding TE00 mode with gain over higher order modes, achieving a single optical mode of dimensions 15.9 pm by 3.5 microm and maintaining a stable lateral M2 beam quality between 1.2 and 1.6 across all drive currents. The ~4x increase in mode size led to a maximum efficiency of >50% and a record breaking maximum CW power of 2.5 W, a 38% output power improvement over conventional 4-mum ridge control devices. A dynamic finite difference beam propagation method amplifier model was developed to simulate advanced modal behavior in flared semiconductor optical amplifiers by overlapping the diode laser rate equations. A 2-D SCOWL array technology was attempted for the first time by evolving the conventional edge-emitting SCOWL into a surface-emitter (SE-SCOWL) by etching a 45° turning mirror through the waveguide to direct the optical beam out of plane for surface-normal emission. The addition of a 90° etched back facet produced an all-etched-facet surface-emitter uniquely capable of 2-D scalability without stacking arrays of cleaved-facet edge-emitting diode lasers. The surface-emitting GaAs-based SCOWL achieved a diffraction limited beam, maximum output power of 1 W, slope efficiency of 0.63 W/A, and a maximum power conversion efficiency of 34%. This achievement represents the first single-mode surface-emitting diode laser with comparable power and efficiency to its edge-emitting counterpart. A wavelength beam combining demonstration of a 15-element 1-D SE-SCOWL array achieved a spectrally diverse single-mode output beam and 8.31 W of output power with a slope efficiency of 0.4 W/A, paving the way for future scaling to large, full-wafer, combinable 2-D diode laser arrays.

ISBN: 9781303882579Subjects--Topical Terms:

516296
Physics.

Novel slab-coupled optical waveguide laser structures for advancing performance scalability.
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500 $a Adviser: Willam H. Goodhue.
502 $a Thesis (Ph.D.)--University of Massachusetts Lowell, 2014.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Modeling, waveguide modifications, and cavity modifications were developed to significantly improve the performance of 1.06 mum tapered slab-coupled optical waveguide lasers (SCOWLs), and to demonstrate a 1.06 mum folded cavity SCOWL device suitable for creating a high power 2-dimensional SCOWL array technology. Improvement of individual device performance was accomplished by designing 5-mm-cavity-length GaAs-based SCOWLs with adiabatically tapered ridge waveguides. A tailored current-injection profile was used to selectively pump the adiabatically expanding TE00 mode with gain over higher order modes, achieving a single optical mode of dimensions 15.9 pm by 3.5 microm and maintaining a stable lateral M2 beam quality between 1.2 and 1.6 across all drive currents. The ~4x increase in mode size led to a maximum efficiency of >50% and a record breaking maximum CW power of 2.5 W, a 38% output power improvement over conventional 4-mum ridge control devices. A dynamic finite difference beam propagation method amplifier model was developed to simulate advanced modal behavior in flared semiconductor optical amplifiers by overlapping the diode laser rate equations. A 2-D SCOWL array technology was attempted for the first time by evolving the conventional edge-emitting SCOWL into a surface-emitter (SE-SCOWL) by etching a 45° turning mirror through the waveguide to direct the optical beam out of plane for surface-normal emission. The addition of a 90° etched back facet produced an all-etched-facet surface-emitter uniquely capable of 2-D scalability without stacking arrays of cleaved-facet edge-emitting diode lasers. The surface-emitting GaAs-based SCOWL achieved a diffraction limited beam, maximum output power of 1 W, slope efficiency of 0.63 W/A, and a maximum power conversion efficiency of 34%. This achievement represents the first single-mode surface-emitting diode laser with comparable power and efficiency to its edge-emitting counterpart. A wavelength beam combining demonstration of a 15-element 1-D SE-SCOWL array achieved a spectrally diverse single-mode output beam and 8.31 W of output power with a slope efficiency of 0.4 W/A, paving the way for future scaling to large, full-wafer, combinable 2-D diode laser arrays.
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