Article
Optics
Hai-Xia Tong, Yan-Jing Wang, Ning Jiang, Si-Cong Tian, Cun-Zhu Tong, Zhi-Peng Wei, Li-Jun Wang
Summary: This paper designs and fabricates a high-speed 850 nm vertical cavity surface-emitting laser with six oxide limiting layers in a & lambda;/2 short cavity. The -3 dB bandwidth reaches 23.8 GHz at room temperature. Clear eye diagrams are obtained under the test conditions of 50 Gbit/s (1 m) and 40 Gbit/s (100 m). Transmission tests show that error-free transmission is achieved at transmission distances of 1 m and 100 m and transmission rates of 40 Gbit/s and 30 Gbit/s, respectively, by NRZ modulation without the use of pre-emphasis, equalization, and forward error correction.
JOURNAL OF INFRARED AND MILLIMETER WAVES
(2023)
Article
Engineering, Electrical & Electronic
Xing Zhang, Guorui Zhang, Yue Wen, Wendou Zhang, Hui Li, Yongqiang Ning, Cunzheng Ning, Lijun Wang, Wenwei Xu
Summary: Successful error-free 50 Gbit/s PAM4 data transmission over 500-m single mode fiber was achieved using our oxide-confined 880-nm single-mode high-speed VCSELs. The proposed VCSEL shows a wide bias span with a flat frequency response, making it suitable for 400G DR8 modules, with evident advantages in cost and power consumption compared to commonly used DML.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Eduardo Mobilon, Dalton Soares Arantes
Summary: This work presents the architecture, design, verification and prototyping of a 100 Gbit/s AES-GCM cryptography engine for optical transport network (OTN) systems. The solution addresses key systemic issues related to using a block cipher in an OTN system, and has been successfully integrated into an OTN Processor ASSP.
MICROELECTRONICS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Yu-Hong Lin, Cheng-Ting Tsai, Wei-Li Wu, Chih-Hsien Cheng, Kent D. Choquette, Gong-Ru Lin
Summary: By comparing different photonic crystal designs, it is found that the VCSEL with Core(flat)+Clad(phc2) design performs well in transmitting complex formatted QAM-OFDM data over multi-mode fiber, while the VCSEL with Core(phc1)+Clad(phc2) design can suppress modal dispersion and maintain high transmission performance after a certain distance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Urs Hecht, Nikolay Ledentsov Jr, Helia Ordouei, Patrick Kurth, Philipp Scholz, Nikolay Ledentsov, Friedel Gerfers
Summary: This paper explains why VCSEL-based transmitter systems cannot achieve data rates higher than 100 Gbit/s and BER better than 10-5 using higher-order PAM modulation formats. Through detailed analysis of the non-linear and biasing-dependent behavior of VCSELs, it proves the limitations of current linear equalization techniques. To address these limitations, a digital non-linear transmit equalizer is proposed, which demonstrates a significant improvement in BER compared to a linear FFE structure in experiments up to 100 Gbit/s. At 112 Gbit/s, the non-linear equalizer successfully achieves a BER of 1.5×10-7.
Article
Multidisciplinary Sciences
S. Marconi, M. A. Giambra, A. Montanaro, V Miseikis, S. Soresi, S. Tirelli, P. Galli, F. Buchali, W. Templ, C. Coletti, V Sorianello, M. Romagnoli
Summary: Graphene, with its fast carrier dynamics and ultra-broadband optical properties, is suitable for optical communications applications. By integrating a photo-thermo-electric graphene photodetector on a silicon waveguide, direct detection of 105 Gbit s(-1) non-return to zero and 120 Gbit s(-1) 4-level pulse amplitude modulation optical signals can be achieved.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Doguscan Ahiboz, Elina Andresen, Phillip Manley, Ute Resch-Genger, Christian Wuerth, Christiane Becker
Summary: Photon upconversion upon 1550 nm excitation is greatly enhanced by using silicon metasurfaces, enabling efficient upconversion even at low external illumination conditions. The findings of this study allow for significant reduction of required external excitation intensities, opening perspectives in biophotonics, telecommunication, and photovoltaics.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Optics
S. Lee, X. Jin, H. Jung, H. Lewis, Y. Liu, B. Guo, S. H. Kodati, M. Schwartz, C. Grein, T. J. Ronningen, J. P. R. David, Joe C. Campbell, S. Krishna
Summary: In this study, a room temperature linear mode APD with high gain, low excess noise factor, and high quantum efficiency at 1550 nm wavelength was demonstrated. The APD on an InP substrate with a GaAs0.5Sb0.5/Al0.85Ga0.15As0.56Sb0.44 heterostructure showed significant improvements compared to commercial InGaAs/InP APDs.
Article
Engineering, Electrical & Electronic
Pen-Jui Peng, Po-Lin Lee, Hsiang-En Huang, Wei-Jian Huang, Ming-Wei Lin, Ying-Zong Juang, Sheng-Hsiang Tseng
Summary: This article presents a 56-Gb/s four-level pulse amplitude modulation (PAM-4) transmitter/receiver (TX/RX) chipset for optical link. The optical transmitter (TX) adopts a digital-to-analog converter (DAC)-based structure with a two-tap nonlinear PAM-4 feed-forward equalizer (FFE) to compensate for the asymmetric responses from the vertical cavity surface-emitting laser (VCSEL). The 56-Gb/s PAM-4 receiver (RX) is connected to the photodiode (PD) and transimpedance amplifier (TIA) module and compensates for interconnection loss with continuous-time linear equalizer (CTLE) and decision-feedback equalizer (DFE). The RX also improves jitter performance with a pattern-filter-based bang-bang phase detector. Both TX and RX are fabricated in the 40-nm CMOS process.
IEEE JOURNAL OF SOLID-STATE CIRCUITS
(2022)
Article
Multidisciplinary Sciences
Johannes Dickmann, Jan Meyer, Mika Gaedtke, Stefanie Kroker
Summary: This paper presents a study on the temperature dependent photo-elastic coefficient in single-crystal silicon at a wavelength of 1550 nm. The results show a significant difference in photo-elasticity between different crystal orientations, and the coefficient's absolute value increases with decreasing temperature. These findings provide valuable insights into the photo-elastic properties of silicon and its behavior under varying mechanical stress.
SCIENTIFIC REPORTS
(2023)
Article
Optics
Takuya Kanai, Masamichi Fujiwara, Ryo Igarashi, Noriko Iiyama, Ryo Koma, Jun-ichi Kani, Tomoaki Yoshida
Summary: This paper introduces the concept of a symmetric 10 Gbit/s high power-budget TDM-PON based on digital coherent technology and confirms its feasibility through a bidirectional transmission experiment with a transmission distance of 40 km and power budget of more than 50 dB. The experiment successfully demonstrates the ability to detect synchronized burst-mode upstream 10 Gbit/s BPSK signals using real-time burst-mode DSP, achieving high receiver sensitivity for both upstream and downstream signals.
Article
Optics
Chen Yang, Shuo Yang, Fan Du, Xianhong Zeng, Beichen Wang, Zijiao Yang, Qiang Luo, Rui Ma, Ru Zhang, Di Jia, Zhenzhong Hao, Yongnan Li, Qifan Yang, Xu Yi, Fang Bo, Yongfa Kong, Guoquan Zhang, Jingjun Xu
Summary: Micro-optical frequency combs, particularly those generated in rare-earth-doped lithium niobate thin film (LNTF), have a significant impact on precision spectroscopy, optical clocks, and high-speed optical communications. In this study, the generation of optical combs in ytterbium-doped LNTF is explored, and the generation of a robust bright soliton is demonstrated, expanding the microcomb-generating platform and increasing the potential for integrated on-chip applications.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Analytical
Yuhang Hu, Zihao Yang, Nuo Chen, Hanwen Hu, Bowen Zhang, Haofan Yang, Xinda Lu, Xinliang Zhang, Jing Xu
Summary: The information capacity of single-mode fiber communication systems is limited by optical nonlinearities. Spatial division multiplexing (SDM) and all-optical signal processing (AOSP) offer new opportunities for upgrading fiber communication systems and improving the capacity of signal processing applications.
Article
Engineering, Electrical & Electronic
Guanzhong Pan, Yun Sun, Meng Xun, Zhuangzhuang Zhao, Jingtao Zhou, Wenjing Jiang, Runze Zhang, Weichao Wu, Dexin Wu
Summary: This article investigates the extrinsic parasitics of 850-nm VCSELs through three different designs. The results show that design C has the lowest parasitic capacitances and the highest modulation bandwidth, suitable for achieving good static and dynamic performance of high-speed VCSELs.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Optics
Yu-Hong Lin, Chih-Hsien Cheng, Cheng-Ting Tsai, Wei-Li Wu, Kent D. Choquette, Gong-Ru Lin
Summary: This study analyzes the transmission performance of bit-loaded quadrature amplitude modulation-orthogonal frequency division multiplexing (QAM-OFDM) encoding and photonic-crystal-engineered multi-mode vertical-cavity surface-emitting lasers (MM-VCSELs). Different surface photonic-crystal designs are used to configure the MM-VCSELs, reducing modal dispersion during OM5-MMF transmission. Comparing the original MM-VCSEL with the photonic-crystal-configured MM-VCSELs, the data rate and transmission performance can be significantly increased.
Article
Optics
Gunter Larisch, Sicong Tian, Dieter Bimberg
Article
Optics
Raja S. R. Gajjela, Arthur L. Hendriks, James O. Douglas, Elisa M. Sala, Petr Steindl, Petr Klenovsky, Paul A. J. Bagot, Michael P. Moody, Dieter Bimberg, Paul M. Koenraad
Summary: By using X-STM and APT, the study of (InGa)(AsSb)/GaAs/GaP quantum dots grown by metal-organic vapor phase epitaxy revealed truncated pyramid shape structures with high GaAs content and lower In and Sb quantities. The composition of the QDs was estimated to be similar to InxGa1 - xAs1 - ySby, where x = 0.25-0.30 and y = 0.10-0.15, which was in agreement with experimental results.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Article
Physics, Multidisciplinary
Petr Steindl, Elisa Maddalena Sala, Benito Alen, Dieter Bimberg, Petr Klenovsky
Summary: Studied the optical properties and carrier dynamics of (InGa)(AsSb)/GaAs/GaP quantum dots, revealing common spectral features and observations of emission from the QDs with recombination times between 2 ns and 10 ns. Suggested potential applications of these QDs in nano memory devices and quantum photonic sources due to their considerable tunability and nearly defect-free growth capabilities on Si. Analysis confirmed the nature of emission blue-shift due to charged-background induced changes of wavefunction spatial distribution.
NEW JOURNAL OF PHYSICS
(2021)
Review
Physics, Applied
Si-Cong Tian, Mansoor Ahamedt, Gunter Larischt, Dieter Bimbergt
Summary: This article summarizes the current state of high-speed VCSEL designs and presents several novel approaches for improving their performance. These designs have the potential to enhance energy efficiency and bandwidth.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Jing Zhang, Chenxi Hao, Wanhua Zheng, Dieter Bimberg, Anjin Liu
Summary: We experimentally demonstrate electrically injected vertical-cavity surface-emitting lasers (VCSELs) with post-supported high-contrast gratings (HCGs) at 940 nm for the first time. The HCG-VCSELs, fabricated without critical point drying, achieve a low threshold current and high side-mode suppression ratio. The design of the HCG-VCSELs enhances the relaxation resonance frequency and enables high-speed modulation. This research has significant practical applications and promising prospects.
PHOTONICS RESEARCH
(2022)
Review
Optics
Andrey Babichev, Sergey Blokhin, Evgenii Kolodeznyi, Leonid Karachinsky, Innokenty Novikov, Anton Egorov, Si-Cong Tian, Dieter Bimberg
Summary: Single-mode long-wavelength vertical-cavity surface-emitting lasers (VCSELs) are a cost-effective alternative to DFB-lasers for data communication in next-generation giga data centers. Spatial division multiplexing transmission through multicore fibers using these lasers allows for larger-scale data center networks. Achieving high-speed modulation is discussed in this review, including the state-of-the-art technology and the use of hybrid short-cavity concept and wafer-fusion concepts.
Article
Optics
Andrey Babichev, Sergey Blokhin, Andrey Gladyshev, Leonid Karachinsky, Innokenty Novikov, Alexey Blokhin, Mikhail Bobrov, Yakov Kovach, Alexander Kuzmenkov, Vladimir Nevedomsky, Nikolay Maleev, Evgenii Kolodeznyi, Kirill Voropaev, Alexey Vasilyev, Victor Ustinov, Anton Egorov, Saiyi Han, Si-Cong Tian, Dieter Bimberg
Summary: A detailed experimental analysis on the impact of device topology on the performance of 1550 nm VCSELs is presented. The high-speed performance of the lasers with L-type device topology is mainly limited by electrical parasitics, while the S-type device topology allows for higher parasitic cutoff frequency and demonstrates more than 13 GHz modulation bandwidth and up to 37 Gbps data transmission under back-to-back conditions at 20°C.
Proceedings Paper
Engineering, Electrical & Electronic
Ahamed Mansoor, Si-Cong Tian, Julian Lindner, Gunter Larisch, Dieter Bimberg
Summary: A novel design for single and multi-aperture VCSELs is introduced, which allows for increased output power, lower resistance, improved thermal stability, and single mode emission. The concept is validated for the first time in this study.
27TH INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC 2021)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Adrian A. Juarez, Xin Chen, Kangmei Li, James Himmelreich, Jason E. Hurley, Snigdharaj K. Mishra, Christian Fiebig, Gunter Larisch, Dieter Bimberg, Ming-Jun Li
2020 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXPOSITION (OFC)
(2020)
Proceedings Paper
Optics
Padullaparthi Babu Dayal, Takemasa Tamanuki, Dieter Bimberg
HIGH-POWER DIODE LASER TECHNOLOGY XVIII
(2020)
Article
Optics
Anjin Liu, Bo Yang, Philip Wolf, Jing Zhang, Dieter Bimberg
Article
Materials Science, Multidisciplinary
Petr Steindl, Elisa Maddalena Sala, Benito Alen, David Fuertes Marron, Dieter Bimberg, Petr Klenovsky
Article
Materials Science, Multidisciplinary
Petr Klenovsky, Andrei Schliwa, Dieter Bimberg
Proceedings Paper
Optics
Dieter Bimberg, Gunter Larisch
SMART PHOTONIC AND OPTOELECTRONIC INTEGRATED CIRCUITS XXI
(2019)
