Techno-Economic Comparison of Silicon Photonics and Multimode VCSELs

Recent technical and commercial milestones in Silicon Photonics technology including its introduction into commercial foundries, and successful integration of most optical components, as well as the choice of single mode fiber in some mega data centers have prompted the speculation that Si photonics is the new low cost solution for optical interconnects and that it may replace multi-mode vertical cavity surface emitting lasers (MM VCSEL). We show that the dominant technology has to offer the lowest cost for the single channel transceiver application, which represents 90% of the data center market and which historically dominates sales. We show that Si photonics is currently significantly more expensive than MM VCSEL for single channel, but that it can make a successful entry into the four channel single mode market with significant growth, capturing 20% of the data center market. We discuss the challenges with Si/InP integration; i.e., hybrid lasers for breaking the cost barrier and to enter the market. We show that both MM VCSEL and Si photonics technologies can operate at 50 Gb/s. We discuss the transmission reach limitations of Si photonics and MM VCSEL and show an example of reach extension for 100 Gb/s using MM VCSEL to 300 m of MM fiber. In addition we show that MM VCSEL has fundamentally lower power consumption than Si photonics and is a good candidate for super-computing applications.

[1]  Ashok V. Krishnamoorthy,et al.  Si photonics technology for future optical interconnection , 2011, 2011 Asia Communications and Photonics Conference and Exhibition (ACP).

[2]  I. Lyubomirsky,et al.  VCSEL-Based Interconnects for Current and Future Data Centers , 2015, Journal of Lightwave Technology.

[3]  T. J. Sleboda,et al.  An ultra low power CMOS photonics technology platform for H/S optoelectronic transceivers at less than $1 per Gbps , 2010, 2010 Conference on Optical Fiber Communication (OFC/NFOEC), collocated National Fiber Optic Engineers Conference.

[4]  Corrado Sciancalepore,et al.  Low-Crosstalk Fabrication-Insensitive Echelle Grating Demultiplexers on Silicon-on-Insulator , 2015, IEEE Photonics Technology Letters.

[5]  Michael Hochberg,et al.  100-Gb/s NRZ optical transceiver analog front-end in 130-nm SiGe BiCMOS , 2014, 2014 Optical Interconnects Conference.

[6]  Antonio Santipo,et al.  Hybrid silicon photonic circuits and transceiver for 56Gb/s NRZ 2.2km transmission over single mode fiber , 2014, 2014 The European Conference on Optical Communication (ECOC).

[7]  Peter Metz,et al.  Ultra-Low-Power Single-Polarization QAM-16 Generation Without DAC Using a CMOS Photonics Based Segmented Modulator , 2015, Journal of Lightwave Technology.

[8]  P. Brianceau,et al.  Heterogeneously integrated III-V/Si distributed Bragg reflector laser with adiabatic coupling , 2013 .

[9]  James A. Lott,et al.  Energy Efficiency of Directly Modulated Oxide-Confined High Bit Rate 850-nm VCSELs for Optical Interconnects , 2013, IEEE Journal of Selected Topics in Quantum Electronics.

[10]  C. Kocot,et al.  A 56.1Gb/s NRZ modulated 850nm VCSEL-based optical link , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[11]  Hui Li,et al.  Energy efficient 40 Gbit/s transmission with 850 nm VCSELs at 108 fJ/bit dissipated heat , 2013 .

[12]  Yann Lamy,et al.  Copper pillar interconnect capability for mmwave applications in 3D integration technology , 2013 .

[13]  Tom Baehr Jones,et al.  50 Gb/s silicon traveling wave Mach-Zehnder modulator near 1300 nm , 2013, OFC 2014.

[14]  G. Masini,et al.  A multi-wavelength 3D-compatible silicon photonics platform on 300mm SOI wafers for 25Gb/s applications , 2013, 2013 IEEE International Electron Devices Meeting.

[15]  Jinzhong Yu,et al.  High-speed, low-loss silicon Mach-Zehnder modulators with doping optimization. , 2013, Optics express.

[16]  P. Gothoskar,et al.  Silicon Photonic Modulator Based on a MOS-Capacitor and a CMOS Driver , 2014, 2014 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS).

[17]  Po Dong,et al.  High-speed low-voltage single-drive push-pull silicon Mach-Zehnder modulators. , 2012, Optics express.

[18]  Jeffrey A. Kash,et al.  Optical interconnects for high performance computing , 2012, 2009 Asia Communications and Photonics conference and Exhibition (ACP).

[19]  D. Molin,et al.  100G SWDM4 transmission over 300m wideband MMF , 2015, 2015 European Conference on Optical Communication (ECOC).

[20]  Roger Dangel,et al.  Polymer waveguides for electro-optical integration in data centers and high-performance computers. , 2015, Optics express.

[21]  M. A. Taubenblatt,et al.  Optical Interconnects for High-Performance Computing , 2009, Journal of Lightwave Technology.

[22]  Tymon Barwicz,et al.  An o-band metamaterial converter interfacing standard optical fibers to silicon nanophotonic waveguides , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[23]  Yasuhiro Matsui,et al.  112-Gb/s WDM link using two directly modulated Al-MQW BH DFB lasers at 56 Gb/s , 2015, 2015 Optical Fiber Communications Conference and Exhibition (OFC).

[24]  Jin-Wei Shi,et al.  Oxide-Relief and Zn-Diffusion 850-nm Vertical-Cavity Surface-Emitting Lasers With Extremely Low Energy-to-Data-Rate Ratios for 40 Gbit/s Operations , 2013, IEEE Journal of Selected Topics in Quantum Electronics.

[25]  K. Hasharoni,et al.  A high end routing platform for core and edge applications based on chip to chip optical interconnect , 2013, 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC).

[26]  Frederic Boeuf,et al.  Hybrid Silicon Photonic Circuits and Transceiver for 50 Gb/s NRZ Transmission Over Single-Mode Fiber , 2015, Journal of Lightwave Technology.

[27]  T. J. Sleboda,et al.  High Contrast 40gbit/s Optical Modulation in Silicon References and Links , 2022 .

[28]  P. Westbergh,et al.  High-Speed Oxide Confined 850-nm VCSELs Operating Error-Free at 40 Gb/s up to 85$^{\circ}{\rm C}$ , 2013, IEEE Photonics Technology Letters.

[29]  Jeremy Witzens,et al.  A 40-Gb/s QSFP Optoelectronic Transceiver in a 0.13μm CMOS Silicon-on-Insulator Technology , 2008, OFC/NFOEC 2008 - 2008 Conference on Optical Fiber Communication/National Fiber Optic Engineers Conference.