1.55-μm InGaAsP-InP laser arrays with integrated-mode expanders fabricated using a single epitaxial growth

Vusirikala, V.; Saini, Simarjeet S.; Bartolo, R.E.; Agarwala, S.; Whaley, R.D.; Johnson, F.G.; Stone, D.R.; Dagenais, M.

doi:10.1109/2944.658787

Cited by 40 publications

(13 citation statements)

References 22 publications

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“…Compared with a lateral coupler, the two vertically stacked asymmetric waveguides are separated by a spacer layer thickness, which is relatively easy to control. Due to these advantages, the vertical couplers have been utilized or proposed for various applications [1][2][3][4] .…”

Section: Introductionmentioning

confidence: 99%

Design of a single mesa vertical coupler

Lee

Chin

2006

Photonics North 2006

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A new design of vertical coupler (VC) based on only a single mesa is presented. The newly proposed vertical coupler has the potential of improving the fabrication yield, as it requires much simpler fabrication process. The vertical coupler comprises a large underlying rib waveguide to which light is coupled. The lower waveguide is formed by the loading effect provided by the smaller upper ridge waveguide. The upper ridge waveguide contains the actual device (e.g. modulator or photodetector) and is tapered in a way to maximize the vertical transfer of light from the lower waveguide, and thus the vertical coupler can be used as a spot-size converter (SSC) between a single-mode fiber and the actual device.. We investigate the transfer efficiency of the single-mesa vertical coupler with different configurations. The single-mesa design is found to give a lower total loss (i.e., fiber coupling loss plus transfer loss) compared with direct coupling to the actual device. The transfer efficiencies obtained are more than 90% for both TE and TM polarizations, and are polarization independent.

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Section: Introductionmentioning

confidence: 99%

Design of a single mesa vertical coupler

Lee

Chin

2006

Photonics North 2006

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“…The advantage of vertical integration is that active and passive devices can be grown in a single-step epitaxy and optimized independently according to their performance requirements 1 . Due to these and other advantages, the vertical couplers have been proposed and utilized in diverse applications [1][2][3][4][5][6][7][8] .…”

Section: Introductionmentioning

confidence: 99%

Vertical coupler architecture for polarization-independent coupling and polarization-selective coupling

Lee

Chin

2005

SPIE Proceedings

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Vertical coupling between waveguides is a critical component for three-dimensional (3-D) integrated optics. Vertical integration adds flexibility in integrating different devices that require different materials, and facilitates coupling of the miniature devices with optical fibers. We propose a systematic design of a relatively simple and versatile vertical coupler that provides not only vertical interconnection, but also mode-size transformation and polarization mode selection all in one. As a vertical polarization splitter, it separates the TE and TM polarizations onto different vertical levels of a 3-D photonics structure, and is thus uniquely different from conventional splitters based on directional couplers or other planar devices. The vertical coupler consists of a larger bottom waveguide that serves to improve the fiber coupling, and a smaller top waveguide that contains the actual photonic device. As a polarization-independent coupler the vertical coupler is shown to transfer light with more than 90% efficiency for all polarizations over a transfer length of only 150 µm. As a polarization mode splitter, the vertical coupler preferentially couples TE or TM polarization with a contrast ratio up to 20dB. This versatility renders the vertical coupler a compact and useful input-stage device that improves the fiber coupling to small active devices and also provides a mechanism of polarization control.

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“…The first device uses an adiabatic coupling taper [10] and the second device uses a resonant coupling taper[l 11. Both of our schemes use single epitaxial growth and conventional fabrication schemes.…”

Section: Introductionmentioning

confidence: 99%

Alignment-tolerant structures for ease of optoelectronic packaging

Dagenais

Saini

Vusirikala

et al. 1999

Testing, Packaging, Reliability, and Applications of Semiconductor Lasers IV

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Expanded mode alignment tolerant optical structures will play an important role in low-cost, large-scale packaging of optoelectronic devices. In this paper, we present two expanded mode structures for operation at I .55 tm. Our devices use single epitaxial growth and conventional fabrication schemes. High butt-coupling efficiencies (>40 %) to a single mode fiber with relaxed alignment tolerances were achieved. The first of our devices uses adiabatic transformation over 500 rim. The second device uses resonant coupling over a much shorter region of 200 m. The second scheme offers an interesting possibility for monolithic integration of active-passive components. We present the design and simulation results of such an integrated device.

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1.55-μm InGaAsP-InP laser arrays with integrated-mode expanders fabricated using a single epitaxial growth

Cited by 40 publications

References 22 publications

Design of a single mesa vertical coupler

Design of a single mesa vertical coupler

Vertical coupler architecture for polarization-independent coupling and polarization-selective coupling

Alignment-tolerant structures for ease of optoelectronic packaging

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