Control of Group Delay and Chromatic Dispersion in Tunable Hollow Waveguide with Highly Reflective Mirrors

Sakurai, Yasuki; Koyama, Fumio

doi:10.1143/jjap.43.5828

Cited by 41 publications

(32 citation statements)

References 5 publications

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“…Bragg reflectors (3 pairs Si/SiO 2 ) enable us to confine different spatial modes in an air core. In addition, tapering the air core results in the vertical radiation at a cut-off condition for each spatial mode [8]. The radiation position is dependent on the order of each spatial mode.…”

Section: Device Structure and Modelingmentioning

confidence: 99%

Spatial mode multiplexer/demultiplexer based on tapered hollow waveguide

Dalir

Yokota

Koyama

2011

IEICE Electron. Express

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A spatial-mode multiplexer/demultiplexer using a Bragg reflector tapered hollow waveguide is proposed. Depending on each spatial mode, vertical radiation takes place at a cut-off condition while the radiation position is dependent on the order of each spatial mode. Modeling of our structure is carried out by using a mode-matching method. The result shows low wavelength dependence and no noticeable polarization dependence while a low insertion loss is expected. Also a tapered hollow waveguide consisting of highly reflective multilayer mirrors with a wafer bonding process is fabricated. Clear vertical radiation could be observed, depending on the order of spatial modes. Our proposed device enables us to integrate surface-normal optical devices such as photo-detectors and VCSELs. The device will be useful for ultra-high capacity optical interconnects using spatial mode multiplexing.

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Section: Device Structure and Modelingmentioning

confidence: 99%

Spatial mode multiplexer/demultiplexer based on tapered hollow waveguide

Dalir

Yokota

Koyama

2011

IEICE Electron. Express

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“…Also, the slow group velocity of light dramatically reduces the size of various optical devices such as optical amplifiers, optical switches, nonlinear optical devices and so on [42,43]. We have also observed large waveguide dispersion and slow light [44] in Bragg waveguides where light is confined with highly reflective Bragg reflectors [45]. We proposed a slow light modulator with a Bragg waveguide [46,47].…”

Section: Slow Light Optical Devicesmentioning

confidence: 99%

VCSEL photonics -advances and new challenges-

Koyama

2009

IEICE Electron. Express

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Abstract:We had the 30-year anniversary since a VCSEL was invented by Kenichi Iga, Tokyo Institute of Technology. We have seen various applications including datacom, sensors, optical interconnects, spectroscopy, optical storages, printers, laser displays, laser radar, atomic clock, optical signal processing and so on. A lot of unique features have been proven, low power consumption, a wafer level testing and so on. In this paper, the brief history and our recent research activities on VCSEL photonics will be reviewed. We present the wavelength engineering of VCSEL arrays for use in high speed short-reach systems, which includes the wavelength integration and wavelength control. The joint research project on ultra-parallel optical links based on VCSEL technologies will be introduced for high speed LANs of 100 Gbps or higher. The small footprint of VCSELs allows us to form a densely packed VCSEL array both in space and in wavelength. The wavelength engineering of VCSELs may open up ultra-high capacity networking. Highly controlled multi-wavelength VCSEL array and novel multi-wavelength combiners are developed toward Terabit/s-class ultrahigh capacity parallel optical links. In addition, the MEMS-based VCSEL technology enables widely tunable operations. We demonstrated an "athermal VCSEL" with avoiding temperature controllers for uncooled WDM applications. In addition, new functions on VCSELs for optical signal processing are addressed. We present an optical nonlinear phase shifter based on a VCSEL saturable absorber and the tunable optical equalization function.Also, highly reflective periodic mirrors commonly used in VCSELs enables us to manipulate the speed of light. This new scheme provides us ultra-compact intensity modulators, optical switches and so on for VCSEL-based photonic integration. Also, this paper explores plasmonic VCSELs. Vol.6, No.11, 651-672 nol. Lett., vol. 11, no. 8, pp. 946-948, Aug. 1999 Commun., vol. 208, pp. 173-182, July 2002. [28] H. Kawaguchi, Y. Yamayoshi, and K. Tamura, "All-optical format conversion using an ultrafast polarization bistable vertical-cavity surfaceemitting laser," Proc. CLEO 2000, CWU2, pp. 379-380, 2000. namic behavior of an all-optical inverter using transverse-mode switching in 1.55-μm vertical-cavity surface-emitting lasers," IEEE Photon.

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“…Using Eqs. (16), (17), (21), and (22), and recalling that n eff < n i , it is clear that G From the above examples, we can see that the use of analytical formulae, Eqs. (23) and (33), has greatly facilitated the analysis of QtW-BRWs.…”

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confidence: 91%

“…To demonstrate these effects we use a rigorous perturbation approach to derive analytical formulae for the first-and second-order polarization dependent dispersion of a nominally quarter-wave Bragg reflection waveguide (QtW-BRW). The motivation to take this approach rather than the numerical ray-optics approach in [17] to demonstrate the dispersion tuning capabilities of BRWs is two-fold. First, analytical solutions elucidate the relation between waveguide design parameters and dispersion, thus facilitating the design of waveguides with desired dispersive properties.…”

Section: Introductionmentioning

confidence: 99%

Dispersion tailoring of the quarter-wave Bragg reflection waveguide

West¹,

Helmy²

2006

Opt. Express

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We present analytical formulae for the polarization dependent first-and second-order dispersion of a quarter-wave Bragg reflection waveguide (QtW-BRW). Using these formulae, we develop several qualitative properties of the QtW-BRW. In particular, we show that the birefringence of these waveguides changes sign at the QtW wavelength. Regimes of total dispersion corresponding to predominantly materialdominated and waveguide-dominated dispersion are identified. Using this concept, it is shown that the QtW-BRW can be designed so as to provide anomalous group velocity dispersion of large magnitude, or very small GVD of either sign, simply by an appropriate chose of layer thicknesses. Implications on nonlinear optical devices in compound semiconductors are discussed. ©2006 Optical Society of America

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Control of Group Delay and Chromatic Dispersion in Tunable Hollow Waveguide with Highly Reflective Mirrors

Cited by 41 publications

References 5 publications

Spatial mode multiplexer/demultiplexer based on tapered hollow waveguide

Spatial mode multiplexer/demultiplexer based on tapered hollow waveguide

VCSEL photonics -advances and new challenges-

Dispersion tailoring of the quarter-wave Bragg reflection waveguide

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