Five-channel surface-normal wavelength-division demultiplexer using substrate-guided waves in conjunction with a polymer-based Littrow hologram

Li, Maggie M.; Chen, Ray T.

doi:10.1364/ol.20.000797

Cited by 15 publications

(10 citation statements)

References 11 publications

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“…The grating spacing is A . A thick volume hologram with a Q factor ( Q = 2icXd I nA2) larger than 10 will have a single main diffraction peak lobe [9]. The direction of the main lobe can be determined by the constructive interference defined by A.…”

Section: Characterization Of Dipsersive Volume Hologramsmentioning

confidence: 99%

“…For the surface-normal light input case, taking derivative of Eq. (8) gives the light dispersion caused by the volume holographic grating as EO=4tan13, (9) Verification of the dispersion relationship of Eq. (9) will facilitate optical design where dispersion plays such an important role as determining optical bus bandwidth.…”

Section: Characterization Of Dipsersive Volume Hologramsmentioning

confidence: 99%

“…[1] During the past 20 years, various type of WDMs and WDDMs have been proposed and demonstrated [2][3][4][5][6][7]. Recently the technique for producing spatially-multiplexed phase grating using polymer-based waveguide holograms for WDDM applications has been reported [8,9]. In this paper, we present a photopolymer based WDDM device for network applications, axial graded index lenses were used to effectively focus light into near diffraction limited spots.…”

Section: Introductionmentioning

confidence: 99%

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<title>Dispersion-enhanced wavelength division multiplexing</title>

Zhou

Dubinovsky

et al. 1997

SPIE Proceedings

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Wavelength division demultiplexer based on dispersive volume holograms and axial graded index(AGRIN) lenses is presented in this paper. The dispersive volume hologram was fabricated with DuPont photopolymer with two beam interference method. Close to 99% center wavelength diffraction efficiency was achieved and the dispersion property of a volume hologram was characterized with a mode-locked femto-second laser source. The experimental data were found to conform well with the theoretical derivations. Axial graded index (AGRIN) lenses have been used as focusing elements to separate light with different incident angles after dispersive volume holograms. By using dispersive volume holograms and AGRIN lenses, a wavelength division demultiplexer with 1 540 nm center wavelength and a 4 nm channel separation was demonstrated.By using two stacked holograms, light dispersion can be further enhanced up to five times. Therefore smaller devices and smaller channel separations can be realized.

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Section: Characterization Of Dipsersive Volume Hologramsmentioning

confidence: 99%

Section: Characterization Of Dipsersive Volume Hologramsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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<title>Dispersion-enhanced wavelength division multiplexing</title>

Zhou

Dubinovsky

et al. 1997

SPIE Proceedings

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“…Furthermore, such a configuration is compatible with the implementation of vertical cavity surface-emitting lasers where the characteristic of azimuthal symmetry may be maintained in the waveguide substrate. 1 The demonstrated device is shown in Fig. 1.…”

Section: ͓S0003-6951͑96͒04552-4͔mentioning

confidence: 99%

Surface-normal 3×3 non-blocking wavelength-selective crossbar using polymer-based volume holograms

Zhou

Chen

1996

Applied Physics Letters

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“…The substrate-guided lights are separated spatially as they propagate along the waveguiding plate. The device length should be long enough so that the output spots will not overlap each other [8]. The collimated spot size is determined by the numerical aperture of the fiber and the GRiN lens.…”

mentioning

confidence: 99%

<title>Four-channel multimode wavelength-division-demultiplexer (WDM) system based on surface-normal volume holographic gratings and substrate-guided waves</title>

et al. 1998

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We demonstrate a four channel integrated wavelength division multiplexer (WDM) and demultiplexer(WDDM) based on volume holographic gratings and substrate-guided waves at near JR wavelengths. The four operating wavelengths are centered at 750, 780, 810 and 840 nm respectively. The WDM and WDDM are demonstrated using 50/125 multimode fibers. The channel-to-channel crosstalk level is measured to be less than -40 dB. The system insertion losses are -23dB, -21dB, -20dB, -22dB respectively for 750 nm, 780 nm, 810 nm and 840 nm. SYSTEM DESCRIPTIONWavelength division multiplexing (WDM) and demultiplexing (WDDM) techniques are the two key technologies for upgrading optical communication system bandwidth. The use of WDM technologies not only provides high speed optical communication links, but also provide advantages such as higher data rates, format transparency, and self-routing. Over the past twenty years, many kinds of WDDM device technologies have been developed and demonstrated [1][2][3][4]. WDDM devices using dispersive photopolymer or dichromated gelatin (DCG) volume holographic gratings have been recently reported [5][6][7]. In this paper, we report an integrated four-channel multimode fiber compatible WDDM system with four semiconductor lasers operating at 750, 780, 810 and 840 nm, respectively. The device is demonstrated using the combination of graded index (GRIN) lenses, photopolymer based holographic gratings and substrate-guided waves.A four channel WDM/WDDM is designed for multimode fiber transmission systems. Multimode fibers are widely used in short haul optical communications. The schematic of a four channel wavelength division multiplexed and demultiplexed optical transmission system is shown in Fig. 1(a). The four discrete wavelengths are provided by semiconductor laser arrays. The four wavelengths are multiplexed into one 50 xm multimode fiber for transmission. At the receiving end, a wavelength division demultiplexer is used to separate the discrete wavelengths for O/E conversion. The integrated four channel polymer holographic grating based WDDM structure is shown iii Fig. 1(b). At the input end, the surface-normal incoming multiple wavelength light is collimated by a quarter pitch GRIN lens and diffracted by the volume holographic grating into substrate guided waves. The input holographic grating is designed using the phase-matching principle. The volume holographic grating has slanted fringes induced by the refractive index modulation inside the photopolymeric film. Since the input holographic grating is dispersive, the input multiple wavelengths are diffracted into different bouncing angles. The substrate-guided lights are separated spatially as they propagate along the waveguiding plate. The device length should be long enough so that the output spots will not overlap each other [8]. The collimated spot size is determined by the numerical aperture of the fiber and the GRiN lens. At the output end, they are coupled out surface-normally by a holographic grating. The light can be detected with a ph...

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Five-channel surface-normal wavelength-division demultiplexer using substrate-guided waves in conjunction with a polymer-based Littrow hologram

Cited by 15 publications

References 11 publications

<title>Dispersion-enhanced wavelength division multiplexing</title>

<title>Dispersion-enhanced wavelength division multiplexing</title>

Surface-normal 3×3 non-blocking wavelength-selective crossbar using polymer-based volume holograms

<title>Four-channel multimode wavelength-division-demultiplexer (WDM) system based on surface-normal volume holographic gratings and substrate-guided waves</title>

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