Cross-cascaded AWG-based wavelength selective switching integrated module using polymer optical waveguide circuits

doi:10.1007/s12200-016-0591-6

Front. Optoelectron.

2016, Vol. 9

Issue (3) : 428-435 https://doi.org/10.1007/s12200-016-0591-6

RESEARCH ARTICLE

Cross-cascaded AWG-based wavelength selective switching integrated module using polymer optical waveguide circuits

Changming CHEN,Daming ZHANG(

)

State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China

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Abstract

100-GHz cross-cascaded arrayed waveguide gratings (AWGs)-based wavelength selective optical switching optical cross-connects (OXCs) modules with Mach-Zehnder interferometer (MZI) thermo-optic (TO) variable optical attenuator (VOA) arrays and optical true-time-delay (TTD) line arrays is successfully designed and fabricated using polymer photonic lightwave circuit. Highly fluorinated photopolymer and grafting modified organic-inorganic hybrid material were synthesized as the waveguide core and cladding, respectively. The one-chip transmission loss is ~6 dB and the crosstalk is less than ~30 dB for the transverse-magnetic (TM) mode. The actual maximum modulation depths of different thermo-optic switches are similar, ~15.5 dB with 1.9 V bias. The maximum power consumption of a single switch is less than 10 mW. The delay time basic increments are measured from 140 to 20 ps. Proposed novel module is flexible and scalable for the dense wavelength division multiplexing network.

Keywords polymer waveguides photosensitive materials integrated optics devices photonics integrated circuits

Corresponding Author(s): Daming ZHANG

Just Accepted Date: 19 August 2016 Online First Date: 07 September 2016 Issue Date: 28 September 2016

Cite this article:

Changming CHEN,Daming ZHANG. Cross-cascaded AWG-based wavelength selective switching integrated module using polymer optical waveguide circuits[J]. Front. Optoelectron., 2016, 9(3): 428-435.

URL:

https://academic.hep.com.cn/foe/EN/10.1007/s12200-016-0591-6
https://academic.hep.com.cn/foe/EN/Y2016/V9/I3/428

Fig.1 Schematic configuration of integrated OXC module

Fig.2 Relations between the core thickness b and the effective refractive indices n_c (green dashed lines) and n_s (blue solid lines) with a = b

Fig.3 Output spectra of transmitted signal lights for each channel

Fig.4 Simulated output wavelength-channel-selected characteristics of the integrated module with temperature ranging from 20°C to 65°C

Fig.5 Fabrication process for UV defined waveguide and electrode heater structure

Fig.6 (a) Scanning electron microscope (SEM) photographs of transmission segment patterns of cross-sectional waveguides; the surface profiles of (b) thermo-optic (TO) variable optical attenuator (VOA) arrayed and serpentine electrode heater (c)

Fig.7 (a) Schematic photographs of the proposed polymer integrated optical cross-connects (OXCs) module measured; (b) near-field guide-mode patterns of the device with signal light from a wide-band erbium-doped optical fiber amplifier (EDFA)

Fig.8 Actual output spectral response from the output channels (a) when driven voltage is 0 V for the last-stage AWG-based wavelength selective switches(WSS); (b) when the λ₋₄~λ₋₇ were directly multiplexed into 1st to 8th modulation channels

Fig.9 Performances of integrated device. (a) TO switch responses obtained by applying square-wave voltage at frequency of 100 Hz; (b) actual channel output versus power consumption of optical switch at 1550 nm for TM mode

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