四级脉冲幅度调制(PAM4)在高速串行链路系统中的地位日益提高,受到越来越多的关注。传统的行波马赫-曾德尔调制器(TWMZM)的分光比为1∶1,文章提出了一种非对称光强的行波马赫-曾德尔调制器(Asymmetric Power TWMZM,AP-TWMZM),并对输入...四级脉冲幅度调制(PAM4)在高速串行链路系统中的地位日益提高,受到越来越多的关注。传统的行波马赫-曾德尔调制器(TWMZM)的分光比为1∶1,文章提出了一种非对称光强的行波马赫-曾德尔调制器(Asymmetric Power TWMZM,AP-TWMZM),并对输入端分光比进行独立推算,得到分光比的值为4∶1。Lumerical软件的建模仿真结果表明,在插入损耗和消光比与TWMZM相当的情况下,AP-TWMZM具有更高的调制效率和更好的线性度,其线性度高达0.948。展开更多
High quality Ge was epitaxially grown on Si using ultrahigh vacuum/chemical vapor deposition （UHV/CVD）. This paper demonstrates efficient germanium-on-silicon p-i-n photodetectors with 0.8 μm Ge, with responsivitie...High quality Ge was epitaxially grown on Si using ultrahigh vacuum/chemical vapor deposition （UHV/CVD）. This paper demonstrates efficient germanium-on-silicon p-i-n photodetectors with 0.8 μm Ge, with responsivities as high as 0.38 and 0.21 A/W at 1.31 and 1.55 μm, respectively. The dark current density is 0.37 mA/cm^2 and 29.4 mA/cm^2 at 0 V and a reverse bias of 0.5 V. The detector with a diameter of 30μm, a 3 dB-bandwidth of 4.72 GHz at an incident wavelength of 1550 nm and zero external bias has been measured. At a reverse bias of 3 V, the bandwidth is 6.28 GHz.展开更多
An optical transceiver with a novel optical subassembly structure is proposed in this paper, which achieves high coupling efficiency and low assembly difficulty. The proposed optical transceiver consumes 0.9 W power a...An optical transceiver with a novel optical subassembly structure is proposed in this paper, which achieves high coupling efficiency and low assembly difficulty. The proposed optical transceiver consumes 0.9 W power and retains a small size of 28 mm×16 mm×3 mm. The fabrication process of the silicon substrate and the assembly process of the optical transceiver are demonstrated in details. Moreover, the optical transceiver is measured in order to verify its transmission performance. The clear eye diagrams and the low bit error rate(BER) less than 10^(-13) at 10 Gbit/s per channel show good transmission characteristics of the designed optical transceiver.展开更多
A dual-lens-integrated distributed feedback(DFB) laser based on hybrid integration for single-mode transmitter optical subassembly(TOSAs) is discussed in this paper. The alignment and fixing of the lenses are simple t...A dual-lens-integrated distributed feedback(DFB) laser based on hybrid integration for single-mode transmitter optical subassembly(TOSAs) is discussed in this paper. The alignment and fixing of the lenses are simple to manipulate and highly accurate, making it possible to achieve high-efficient optical coupling to single-mode fiber(SMF) without additional high-precision tools and fixing equipment. The capability for a low coupling loss of less than 3 d B between the laser and fiber was demonstrated. The fabricated TOSA module has clear opening eyes with minor time jitters at a bit rate of 25 Gbit/s. This hybrid integration is a low fabrication cost, compact, and low insertion loss method to manufacture TOSA for a 200 or 400 Gb E optical transceiver in a high-speed optical network.展开更多
文摘四级脉冲幅度调制(PAM4)在高速串行链路系统中的地位日益提高,受到越来越多的关注。传统的行波马赫-曾德尔调制器(TWMZM)的分光比为1∶1,文章提出了一种非对称光强的行波马赫-曾德尔调制器(Asymmetric Power TWMZM,AP-TWMZM),并对输入端分光比进行独立推算,得到分光比的值为4∶1。Lumerical软件的建模仿真结果表明,在插入损耗和消光比与TWMZM相当的情况下,AP-TWMZM具有更高的调制效率和更好的线性度,其线性度高达0.948。
基金Project supported by the National High-Technology Research and Development Program of China (Grant No 2006AA03Z415)the Major State Basic Program of China (Grant No 2007CB613404)the National Natural Science Foundation of China(Grant No 60676005)
文摘High quality Ge was epitaxially grown on Si using ultrahigh vacuum/chemical vapor deposition （UHV/CVD）. This paper demonstrates efficient germanium-on-silicon p-i-n photodetectors with 0.8 μm Ge, with responsivities as high as 0.38 and 0.21 A/W at 1.31 and 1.55 μm, respectively. The dark current density is 0.37 mA/cm^2 and 29.4 mA/cm^2 at 0 V and a reverse bias of 0.5 V. The detector with a diameter of 30μm, a 3 dB-bandwidth of 4.72 GHz at an incident wavelength of 1550 nm and zero external bias has been measured. At a reverse bias of 3 V, the bandwidth is 6.28 GHz.
基金supported by the National High Technology Research and Development Program of China(No.2015AA016904)
文摘An optical transceiver with a novel optical subassembly structure is proposed in this paper, which achieves high coupling efficiency and low assembly difficulty. The proposed optical transceiver consumes 0.9 W power and retains a small size of 28 mm×16 mm×3 mm. The fabrication process of the silicon substrate and the assembly process of the optical transceiver are demonstrated in details. Moreover, the optical transceiver is measured in order to verify its transmission performance. The clear eye diagrams and the low bit error rate(BER) less than 10^(-13) at 10 Gbit/s per channel show good transmission characteristics of the designed optical transceiver.
基金supported by the National Key R&D Program of China (No.2017YFB0404800)。
文摘A dual-lens-integrated distributed feedback(DFB) laser based on hybrid integration for single-mode transmitter optical subassembly(TOSAs) is discussed in this paper. The alignment and fixing of the lenses are simple to manipulate and highly accurate, making it possible to achieve high-efficient optical coupling to single-mode fiber(SMF) without additional high-precision tools and fixing equipment. The capability for a low coupling loss of less than 3 d B between the laser and fiber was demonstrated. The fabricated TOSA module has clear opening eyes with minor time jitters at a bit rate of 25 Gbit/s. This hybrid integration is a low fabrication cost, compact, and low insertion loss method to manufacture TOSA for a 200 or 400 Gb E optical transceiver in a high-speed optical network.
