All-Optical Cross-Absorption-Modulation Based Gb/s Switching With Silicon Quantum Dots

Huang, Bo-Ji; Wu, Cheng‐Lung; Cheng, Chih‐Hsien; Hsieh, Cheng-Hsuan; Syu, Shih‐Chang; Lin, Yung‐Ya; Wang, Huai‐Yung; Tsai, C.S.; Chi, Yu‐Chieh; Chang, Phei‐Lang; Wu, Chih‐I; Lin, Gong−Ru

doi:10.1109/jstqe.2016.2553458

Cited by 8 publications

(3 citation statements)

References 45 publications

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“…A pumping data bit with a pulsewidth of 83 ps was obtained by externally modulating the single-mode optical carrier with a Mach–Zehnder modulator (MZM, JDSU, 10024180). The pumping pulse was further amplified with two-stage erbium-doped fiber amplifiers (EDFAs, JDSU, OAB1552+20FA6 and SDO, EFAH1B111NC02). , To avoid the large amplified spontaneous emission (ASE) noise induced by the high-gain EDFA, an optical band-pass filter (OBPF, SANTEC, OTF-910 and JDS, TB1500B) was utilized to eliminate the ASE noise, and a polarization controller was used to detune the input polarization field, as shown in Figure (b). To precisely confirm the free-carrier lifetime in the SiGeC film, an ultrashort fiber laser pulse with a pulsewidth as short as 0.83 ps at 1570 nm was utilized and amplified by using an EDFA to demonstrate the cross-wavelength modulation, as shown in Figure (c).…”

Section: Methodsmentioning

confidence: 99%

SiGeC Waveguide for All-Optical Data Switching

et al. 2018

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The SiGeC waveguide based ultrafast all-optical switching by using the cross-absorption modulation (XAM) effect is demonstrated to perform the wavelength conversion and format inversion of a pulsed return-to-zero on–off keying (PRZ-OOK) data stream. Under the intensively optical data-bit illumination as the pump, the two-photon absorption (TPA) effect is observed to induce free carriers in the SiGeC for absorbing the power of the probe beam. This free-carrier absorption (FCA) procedure inversely modulates the probe beam to cause the XAM switching via the intensively pumping data-bit-induced TPA/FCA process. With employing the Ge content into the SiC matrix, the picosecond free-carrier lifetime of the SiGeC can be obtained by further degrading the injected pumping energy under all-optical switching operation. With reducing the pumping energy from 0.5 nJ to 22 pJ, the effective response time of the all-optical XAM switching successfully shortens from 120 to 2 ps. Experiments declare that even a relatively low pumping energy can result in a sufficiently large XAM to perform the ultrafast all-optical switching in the SiGeC waveguide based all-optical modulator, providing the all-optical data format inversion and broadband wavelength conversion of the PRZ-OOK data stream at 1.2–6.0 Gbit/s.

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Section: Methodsmentioning

confidence: 99%

SiGeC Waveguide for All-Optical Data Switching

et al. 2018

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“…However, optical switching does not require O/E/O conversions and is transparent to data bit rate, signal format and protocol, with lower power consumption and lower cost. Although the speed of optical switch (i.e., from nanoseconds to milliseconds) is still slower than that of electrical switch (i.e., ~picoseconds) and all-optical signal processing is immature [8,9,10], it is possible to have both of them cooperate together to handle the switching scenarios of long packets and short burst packets based on their own advantages.…”

Section: Introductionmentioning

confidence: 99%

State of the Art and Perspectives on Silicon Photonic Switches

Song

Huang

et al. 2019

Micromachines

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In the last decade, silicon photonic switches are increasingly believed to be potential candidates for replacing the electrical switches in the applications of telecommunication networks, data center and high-throughput computing, due to their low power consumption (Picojoules per bit), large bandwidth (Terabits per second) and high-level integration (Square millimeters per port). This review paper focuses on the state of the art and our perspectives on silicon photonic switching technologies. It starts with a review of three types of fundamental switch engines, i.e., Mach-Zehnder interferometer, micro-ring resonator and micro-electro-mechanical-system actuated waveguide coupler. The working mechanisms are introduced and the key specifications such as insertion loss, crosstalk, switching time, footprint and power consumption are evaluated. Then it is followed by the discussion on the prototype of large-scale silicon photonic fabrics, which are based on the configuration of above-mentioned switch engines. In addition, the key technologies, such as topological architecture, passive components and optoelectronic packaging, to improve the overall performance are summarized. Finally, the critical challenges that might hamper the silicon photonic switching technologies transferring from proof-of-concept in lab to commercialization are also discussed.

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“…Huang et al . observed the FCA effect in SiC micro-ring for implementing the all-optical data switching, which provides a signal-to-noise ratio (SNR) can be achieved as high ae 5 dB under the 1-Gbit/s PRZ-OOK data transmission 13 . In addition, the polarization modulation can also be applied with versatile approaches.…”

Section: Introductionmentioning

confidence: 99%

Realizing multi-functional all-optical data processing on nanoscale SiC waveguides

Syu

Cheng

Wang

et al. 2018

Sci Rep

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All-optical logics are realized on nanoscale SiC waveguides with add-drop micro-ring functionality, including the TE/TM polarized data decoding, the dual-port Kerr switching and gating beyond 12 Gbit/s. With employing the C-C bond enriched SiC thin film upon thermal oxide, the nonlinear refractive index of up to 2.44 × 10−12 cm2/W enables the asymmetric waveguide with polarization distinguishable transmission, which provides a polarization-selectivity to discreminate the TE/TM polarized data decoding with an nearly 9-dB extinction ratio. The TE/TM polarized decoding performance is comparable with a state-of-the-art fiberized in-line polarizer. The complementary transmission in the bus waveguide port facilitates the dual-port Kerr switching for data format conversion/inversion in both add/drop channels. Owing to the TE/TM polarization discriminated throughput, the asymmetric add-drop waveguide micro-ring also permits all-optical AND logic gating functions, where the ON-state outputs only if the pump bit is set at ON state and the probe bit with matched polarization. These results reveal the multi-functionality of the nanoscale SiC add-drop micro-ring waveguide for future photonic logics on chip.

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All-Optical Cross-Absorption-Modulation Based Gb/s Switching With Silicon Quantum Dots

Cited by 8 publications

References 45 publications

SiGeC Waveguide for All-Optical Data Switching

SiGeC Waveguide for All-Optical Data Switching

State of the Art and Perspectives on Silicon Photonic Switches

Realizing multi-functional all-optical data processing on nanoscale SiC waveguides

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