Silicon photonic chip for 16-channel wavelength division (de-)multiplexing in the O-band

Davis, Jordan; Li, Ang; Alshamrani, Naif; Fainman, Yeshaiahu

doi:10.1364/oe.397141

Cited by 19 publications

(5 citation statements)

References 12 publications

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“…Since good repeatability can be obtained, cascaded Bragg gratings can also be pre pared. Actually, multi-wavelength multiplexing also has important applications in mu tiparameter sensing and optical communication [34]. The multiplexing of fiber Bragg gra ings can be used for the multi-wavelength ring laser [35].…”

Section: Characterization Of Uniform and Cascaded Bragg Gratingsmentioning

confidence: 99%

Femtosecond Laser Modification of Silica Optical Waveguides for Potential Bragg Gratings Sensing

et al. 2022

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The optimum femtosecond laser direct writing of Bragg gratings on silica optical waveguides has been investigated. The silica waveguide has a 6.5 × 6.5 µm2 cross-sectional profile with a 20-µm-thick silicon dioxide cladding layer. Compared with conventional grating inscribed on fiber platforms, the silica planar waveguide circuit can realize a stable performance as well as a high-efficiency coupling with the fiber. A thin waveguide cladding layer also facilitates laser focusing with an improved spherical aberration. Different from the circular fiber core matching with the Gaussian beam profile, a 1030-nm, 400-fs, and 190-nJ laser is optimized to focus on the top surface of the square silica waveguide, and the 3rd-order Bragg gratings are inscribed successfully. A 1.5-mm long uniform Bragg gratings structure with a reflectivity of 90% at a 1548.36-nm wavelength can be obtained. Cascaded Bragg gratings with different periods are also inscribed in the planar waveguide. Different reflection wavelengths can be realized, which shows great potential for wavelength multiplexing-related applications such as optical communications or sensing.

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Section: Characterization Of Uniform and Cascaded Bragg Gratingsmentioning

confidence: 99%

Femtosecond Laser Modification of Silica Optical Waveguides for Potential Bragg Gratings Sensing

et al. 2022

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“…A key to solving this problem is exploiting optical interconnects to enhance the link capacity, which exhibit potential for high speed, broad bandwidth, and low power consumption 3 – 5 To realize high-capacity optical communications, multiplexing techniques have been widely investigated and utilized, including wavelength-division multiplexing (WDM), 6 – 8 polarization-division multiplexing (PDM), 9 – 12 and mode-division multiplexing (MDM) 13 – 15 Among them, the MDM technique has attracted substantial attention, as it leverages multiple orthogonal spatial modes as the carrier to transmit massive data in parallel within a single wavelength, which is promising to meet the rapidly increasing demand for high-capacity and low-cost optical interconnects 16 , 17 …”

Section: Introductionmentioning

confidence: 99%

Reconfigurable optical add-drop multiplexers for hybrid mode-/wavelength-division-multiplexing systems

Yi,

Zhao,

et al. 2023

Adv. Photon. Nexus

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Dealing with the increase in data workloads and network complexity requires efficient selective manipulation of any channels in hybrid mode-/wavelength-division multiplexing (MDM/WDM) systems. A reconfigurable optical add-drop multiplexer (ROADM) using special modal field redistribution is proposed and demonstrated to enable the selective access of any mode-/wavelength-channels. With the assistance of the subwavelength grating structures, the launched modes are redistributed to be the supermodes localized at different regions of the multimode bus waveguide. Microring resonators are placed at the corresponding side of the bus waveguide to have specific evanescent coupling of the redistributed supermodes, so that any mode-/wavelength-channel can be added/dropped by thermally tuning the resonant wavelength. As an example, a ROADM for the case with three mode-channels is designed with low excess losses of <0.6, 0.7, and 1.3 dB as well as low cross talks of < − 26.3, −28.5, and −39.3 dB for the TE 0 , TE 1 , and TE 2 modes, respectively, around the central wavelength of 1550 nm. The data transmission of 30 Gbps∕channel is also demonstrated successfully. The present ROADM provides a promising route for data switching/routing in hybrid MDM/WDM systems.

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“…The resonance wavelength of a DBR resonator can be tuned via thermo-optic effect and plasma dispersion effect as traditionally utilized for silicon photonic resonators [11]. This configuration has been shown to be an alternate choice for applications such as sensing [12], [13], wavelength adddrop multiplexing [14], modulation [15], microwave signal processing [16], [17] as well as quantum photonic applications [18]. Earlier investigations on DBR cavity based narrow-line resonance filters have established the precedent for achieving tunable filter and modulator characteristics with small footprint by Kim et al [19].…”

Section: Introductionmentioning

confidence: 99%

Compact Tunable Resonance Filters with Ultra-Broad Rejection for Silicon Photonics

Priyadarshini,

Goswami,

Velamuri

et al. 2023

Preprint

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<p>This paper reports a novel design of compact tuneable resonance filter with a highly extinguished and ultra-broad out-of-band rejection in CMOS compatible silicon photonics technology platform. The proposed device is designed with two identically apodized distributed grating structures for guided Fabry-Pérot resonant transmissions in a silicon on insulator rib waveguide structure. The device design parameters are optimized by theoretical simulation for a low insertion loss singly-resonant transmission peak at a desired wavelength. However, the devices were fabricated (using in-house facilities) to demonstrate multiple resonant transmission peaks along with a singly-resonant one. We observed that a device length of as low as ∼35 𝜇m exhibits a rejection band as large as ∼60 nm with an extinction of ∼40 dB with respect to the resonant wavelength peak at 𝜆𝑟∼1550 nm (FWHM ∼80 pm, IL∼2 dB). The experimental results have been shown to be closely matching to our theoretical simulation and modelling results. As expected from the theoretical prediction, the trend pertaining to the trade-off between passive insertion loss and Q-value of the resonances has been observed depending on the device parameters. The thermo-optic tuning characteristics of resonant wavelengths have been obtained by integrating microheaters in the cavity. The resonance peak has been tuned at a rate of 96 pm per mW of consumed thermal power. The thermo-optic switching response has been measured to be in the order of ~5 𝜇s. As a potential application, noise associated with an amplified pump wavelength (𝜆𝑃∼1550 nm) has been shown to be suppressed by ∼15 dB (up to the detector noise floor) which can be investigated further for large-scale integrated quantum photonic circuits. The demonstrated device can also be explored further for many other applications such as modulation, add-drop multiplexing, sensing etc. </p>

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Silicon photonic chip for 16-channel wavelength division (de-)multiplexing in the O-band

Cited by 19 publications

References 12 publications

Femtosecond Laser Modification of Silica Optical Waveguides for Potential Bragg Gratings Sensing

Femtosecond Laser Modification of Silica Optical Waveguides for Potential Bragg Gratings Sensing

Reconfigurable optical add-drop multiplexers for hybrid mode-/wavelength-division-multiplexing systems

Compact Tunable Resonance Filters with Ultra-Broad Rejection for Silicon Photonics

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