Athermal arrayed waveguide gratings in silicon-on-insulator by overlaying a polymer cladding on narrowed arrayed waveguides

Wang, Linghua; Bogaerts, Wim; Dumon, Pieter; Selvaraja, Shankar Kumar; Teng, Jie; Pathak, Shibnath; Han, Xiuyou; Wang, Jinyan; Jian, Xigao; Zhao, Mingshan; Baets, Roel; Morthier, Geert

doi:10.1364/ao.51.001251

Cited by 28 publications

(13 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Ref. [16], an athermal silicon nanowire AWG was demonstrated, and the wavelength temperature dependence was −1.5 pm∕°C, but the crosstalk was only −15 dB. We also reported an AWGbased receiver in 2010, and the crosstalk of our nanowire 32-channel silicon AWG was around −18 dB [17] .…”

mentioning

confidence: 64%

Low-crosstalk silicon photonics arrayed waveguide grating

Zhang

Chen

et al. 2017

Chin. Opt. Lett.

View full text Add to dashboard Cite

In this Letter, we demonstrate a 1 × 4 low-crosstalk silicon photonics cascaded arrayed waveguide grating, which is fabricated on a silicon-on-insulator wafer with a 220-nm-thick top silicon layer and a 2 μm buried oxide layer. The measured on-chip transmission loss of this cascaded arrayed waveguide grating is ∼4.0 dB, and the fiber-towaveguide coupling loss is 1.8 dB/facet. The measured channel spacing is 6.4 nm. The adjacent crosstalk by characterization is very low, only −33.2 dB. Compared to the normal single silicon photonics arrayed waveguide grating with a crosstalk of ∼ −12.5 dB, the crosstalk of more than 20 dB is dramatically improved in this cascaded device.OCIS [1] , a planar concave grating [2,3] , an arrayed waveguide grating (AWG) [4] , and so on. Compared to other basic structures, AWGs have a better optical performance, such as low insertion loss, good channel spacing uniformity, low crosstalk, etc. So, AWG is a widely used multiplexer/de-multiplexer in optical communication systems. Due to the compatibility of the refractive index with standard optical fibers, silica-based AWGs are the most common commercial multiplexer/ de-multiplexer. However, it is hard to realize monolithic integration with other high-speed active devices, although silica-based AWGs have good optical performances as a multiplexer/de-multiplexer.In recent decades, silicon photonics have attracted much attention because silicon materials can be used to fabricate monolithic integration circuits with passive/ active devices, and the process is compatible with complementary metal oxide semiconductor technology [5][6][7] . Silicon-based AWGs on silicon-on-insulator (SOI) wafers with a several-microns-thick top silicon layers were demonstrated in the early 2000s. For example, a turningmirror-integrated AWG with a 4.25-μm-thick top silicon layer was reported, and it had a crosstalk of −23 dB [8] . An AWG-based monolithic integration of a mulitiplexer was presented on an SOI wafer with a 2.5-μm-thick top silicon layer, and its crosstalk was better than −25 dB [9] . However, it is hard to achieve high-speed active devices on such micron-scale SOI wafers, and the footprint size is big because of the big bend radius of this kind of silicon waveguide. Subsequently, more attention was focused on silicon nanowire devices. Many nanowire silicon photonics passive/active devices with good performances have been demonstrated on an SOI platform with a thin (220 nm typically) top silicon layer, including mode size converters [10] , ring-based devices [11] , high-speed modulators [12] , high-speed photo-detectors [13] , etc. Silicon nanowire AWGs were also presented in the past decade. In Ref.[14], a compact nanowire AWG was reported. The insertion loss was 2.2 dB, and the crosstalk was −20 dB. A 12-channel flattened-spectral-response AWG was presented on an SOI wafer with a 220-nm-thick top silicon layer, and the crosstalk was −17 dB [15] . In Ref.[16], an athermal silicon nanowire AWG was demonstrated, and the wavelength temperature dependen...

show abstract

mentioning

confidence: 64%

Low-crosstalk silicon photonics arrayed waveguide grating

Zhang

Chen

et al. 2017

Chin. Opt. Lett.

View full text Add to dashboard Cite

show abstract

“…One can fill the polymer material into the grooves in the silicon waveguide core region [81][82][83], which however requires very precise control for the waveguide fabrication. An alternative is using polymer as the upper-cladding of the waveguide [84][85][86]. In Ref.…”

Section: General Issues For Wdm Filters Based On Soi Nanowires 231 mentioning

confidence: 99%

Silicon-based on-chip multiplexing technologies and devices for Peta-bit optical interconnects

2014

View full text Add to dashboard Cite

An effective solution to enhance the capacity of an optical-interconnect link is utilizing advanced multiplexing technologies, like wavelength-division-multiplexing (WDM), polarization-division multiplexing (PDM), spatial-division multiplexing (SDM), bi-directional multiplexing, etc. On-chip (de)multiplexers are necessary as key components for realizing these multiplexing systems and they are desired to have small footprints due to the limited physical space for on-chip optical interconnects. As silicon photonics has provided a very attractive platform to build ultrasmall photonic integrated devices with CMOS-compatible processes, in this paper we focus on the discussion of silicon-based (de)multiplexers, including WDM filters, PDM devices, and SDM devices. The demand of devices to realize a hybrid multiplexing technology (combining WDM, PDM and SDM) as well as a bidirectional multiplexing technologies are also discussed to achieve Peta-bit optical interconnects.

show abstract

“…Ring resonators can be used as both WDM space switches and wavelength routing elements. The other main option for wavelength routing is the arrayed waveguide grating (AWG) [124] which is also limited in scalability by loss and crosstalk.…”

Section: B Photonic Switchingmentioning

confidence: 99%

Reconfigurable Network Systems and Software-Defined Networking

et al. 2015

View full text Add to dashboard Cite

This paper reviews the current state of the art in reconfigurable network systems, covering hardware reconfiguration and its interplay with software-defined networking (SDN).ABSTRACT | Modern high-speed networks have evolved from relatively static networks to highly adaptive networks facilitating dynamic reconfiguration. This evolution has influenced all levels of network design and management, introducing increased programmability and configuration flexibility. This influence has extended from the lowest level of physical hardware interfaces to the highest level of network management by software. A key representative of this evolution is the emergence of software-defined networking (SDN). In this paper, we review the current state of the art in reconfigurable network systems, covering hardware reconfiguration, SDN, and the interplay between them. We take a top-down approach, starting with a tutorial on software-defined networks. We then continue to discuss programming languages as the linking element between different levels of software and hardware in the network. We review electronic switching systems, highlighting programmability and reconfiguration aspects, and describe the trends in reconfigurable network elements. Finally, we describe the state of the art in the integration of photonic transceiver and switching elements with electronic technologies, and consider the implications for SDN and reconfigurable network systems.

show abstract

Athermal arrayed waveguide gratings in silicon-on-insulator by overlaying a polymer cladding on narrowed arrayed waveguides

Cited by 28 publications

References 26 publications

Low-crosstalk silicon photonics arrayed waveguide grating

Low-crosstalk silicon photonics arrayed waveguide grating

Silicon-based on-chip multiplexing technologies and devices for Peta-bit optical interconnects

Reconfigurable Network Systems and Software-Defined Networking

Contact Info

Product

Resources

About