Miniaturized interferometric fiber optic gyroscopes(IFOGs)providing high-precision angular measurement are highly desired in various smart applications.In this work,we present a high-performance Si-SiN photonic FOG tr...Miniaturized interferometric fiber optic gyroscopes(IFOGs)providing high-precision angular measurement are highly desired in various smart applications.In this work,we present a high-performance Si-SiN photonic FOG transceiver composed of an optical source,polarizer,splitter,and on-chip germanium(Ge)photodetector(PD).The transceiver is assembled in a standard butterfly package with a thermo-electric cooler(TEC).The optical loss(including two edge couplers,as well as one 3 dB splitter)and polarization extinction ratio(PER)are less than 7 dB and greater than 20 dB at room temperature,respectively.Built with the polarization maintaining(PM)fiber coil with 70 mm average diameter and 580 m length,the transceiver-based IFOG exhibits record-low bias stability of 0.022 deg/h at an integration time of 10 s,the angular random walk(ARW)of 0.0012 deg∕√h p,and the bias instability of 0.003 deg/h,to the best of our knowledge.The preliminary reliability test agrees well with the practical requirements.Our work verifies that the on-chip Ge PD is eligible for high-performance FOG applications.Leveraged with the typical CMOS compatible 8-inch(200 mm diameter wafers)silicon photonics platform and decreased fiber splicing points,the presented transceiver provides a promising solution toward a low-loss and miniaturized FOG system with large volume manufacturing capability.展开更多
We demonstrate a single-chip silicon optical single sideband (OSSB) modulator composed of a radio frequenc(RF) branch line coupler (BLC) and a silicon dual-parallel Mach–Zehnder modulator (DP-MZM).A co-design between...We demonstrate a single-chip silicon optical single sideband (OSSB) modulator composed of a radio frequenc(RF) branch line coupler (BLC) and a silicon dual-parallel Mach–Zehnder modulator (DP-MZM).A co-design between the BLC and the DP-MZM is implemented to improve the sideband suppression ratio (SSR).The modu lator has a modulation efficiency of V_(π)L_(π)~1.75 V·cm and a 3 dB electro-optical (EO) bandwidth of 48.7 GHz The BLC can generate a pair of RF signals with equal amplitudes and orthogonal phases at the optimal frequenc of 21 GHz.We prove through theoretical calculation and experiment that,although the BLC’s performance in terms of power balance and phase orthogonality deteriorates in a wider frequency range,high SSRs can be realized by adjusting relevant bias phases of the DP-MZM.With this technique,the undesired sidebands are completel suppressed below the noise floor in the frequency range from 15 GHz to 30 GHz when the chip operates in the ful carrier OSSB (FC-OSSB) mode.In addition,an SSR>35 dB and an carrier suppression ratio (CSR)>42 dB ar demonstrated at 21 GHz in the suppressed carrier OSSB (SC-OSSB) mode.展开更多
基金National Natural Science Foundation of China(62105051).
文摘Miniaturized interferometric fiber optic gyroscopes(IFOGs)providing high-precision angular measurement are highly desired in various smart applications.In this work,we present a high-performance Si-SiN photonic FOG transceiver composed of an optical source,polarizer,splitter,and on-chip germanium(Ge)photodetector(PD).The transceiver is assembled in a standard butterfly package with a thermo-electric cooler(TEC).The optical loss(including two edge couplers,as well as one 3 dB splitter)and polarization extinction ratio(PER)are less than 7 dB and greater than 20 dB at room temperature,respectively.Built with the polarization maintaining(PM)fiber coil with 70 mm average diameter and 580 m length,the transceiver-based IFOG exhibits record-low bias stability of 0.022 deg/h at an integration time of 10 s,the angular random walk(ARW)of 0.0012 deg∕√h p,and the bias instability of 0.003 deg/h,to the best of our knowledge.The preliminary reliability test agrees well with the practical requirements.Our work verifies that the on-chip Ge PD is eligible for high-performance FOG applications.Leveraged with the typical CMOS compatible 8-inch(200 mm diameter wafers)silicon photonics platform and decreased fiber splicing points,the presented transceiver provides a promising solution toward a low-loss and miniaturized FOG system with large volume manufacturing capability.
基金National Key Research and Development Program of China(2021YFB2800500)Scientific Project of Zhejiang Laboratory(2020LC0AD02)+1 种基金Science and Technology Program of Zhejiang Province(2022C01108)Science and Technology Innovation 2025 Major Project of Ningbo(2020Z021)
文摘We demonstrate a single-chip silicon optical single sideband (OSSB) modulator composed of a radio frequenc(RF) branch line coupler (BLC) and a silicon dual-parallel Mach–Zehnder modulator (DP-MZM).A co-design between the BLC and the DP-MZM is implemented to improve the sideband suppression ratio (SSR).The modu lator has a modulation efficiency of V_(π)L_(π)~1.75 V·cm and a 3 dB electro-optical (EO) bandwidth of 48.7 GHz The BLC can generate a pair of RF signals with equal amplitudes and orthogonal phases at the optimal frequenc of 21 GHz.We prove through theoretical calculation and experiment that,although the BLC’s performance in terms of power balance and phase orthogonality deteriorates in a wider frequency range,high SSRs can be realized by adjusting relevant bias phases of the DP-MZM.With this technique,the undesired sidebands are completel suppressed below the noise floor in the frequency range from 15 GHz to 30 GHz when the chip operates in the ful carrier OSSB (FC-OSSB) mode.In addition,an SSR>35 dB and an carrier suppression ratio (CSR)>42 dB ar demonstrated at 21 GHz in the suppressed carrier OSSB (SC-OSSB) mode.
