Large Bandwidth, Small Current Density, and Temperature Stable 980-nm VCSELs

A low-cost method to adjust the mirror reflectivity of vertical-cavity surface-emitting lasers (VCSELs) helps to optimize the cavity photon lifetime. The joint variation of photon lifetime and the oxide aperture diameter of our 980-nm VCSELs allows optimization procedures between the laser parameters. A new indicator helps to judge the optimum mirror reflectivity to enable increased bit rates in concert with reduced energy consumption, as well as temperature stability, and a smaller bias current density. Error-free back-to-back data transmission at 50 Gb/s over a wide temperature range from 25 °C to 75 °C for completely unchanged driving conditions is presented amongst other progress, including a 400-fJ/b data transmission energy efficiency at 50 Gb/s.

[1]  L. Coldren,et al.  Diode Lasers and Photonic Integrated Circuits , 1995 .

[2]  Alexander V. Rylyakov,et al.  A 50 Gb/s NRZ Modulated 850 nm VCSEL Transmitter Operating Error Free to 90 °C , 2015, Journal of Lightwave Technology.

[3]  Johan S. Gustavsson,et al.  Impact of Damping on High-Speed Large Signal VCSEL Dynamics , 2015, Journal of Lightwave Technology.

[4]  Hui Li,et al.  Energy-efficient oxide-confined high-speed VCSELs for optical interconnects , 2014, Photonics West - Optoelectronic Materials and Devices.

[5]  Yoshiyasu Doi,et al.  A 56-Gb/s receiver front-end with a CTLE and 1-tap DFE in 20-nm CMOS , 2014, 2014 Symposium on VLSI Circuits Digest of Technical Papers.

[6]  Hui Li,et al.  Error-free 46 Gbit/s operation of oxide-confined 980 nm VCSELs at 85°C , 2014 .

[7]  P. Westbergh,et al.  Advances in VCSELs for Communication and Sensing , 2010, IEEE Journal of Selected Topics in Quantum Electronics.

[8]  Gadi Eisenstein,et al.  Comparison of dynamic properties of ground- and excited-state emission in p-doped InAs/GaAs quantum-dot lasers , 2014 .

[9]  James A. Lott,et al.  Impact of Photon Lifetime on the Temperature Stability of 50 Gb/s 980 nm VCSELs , 2016, IEEE Photonics Technology Letters.

[10]  Hui Li,et al.  Temperature-Stable, Energy-Efficient, and High-Bit Rate Oxide-Confined 980-nm VCSELs for Optical Interconnects , 2014, IEEE Journal of Selected Topics in Quantum Electronics.

[11]  Alex Mutig,et al.  Highly temperature-stable modulation characteristics of multioxide-aperture high-speed 980 nm vertical cavity surface emitting lasers , 2010 .

[12]  James A. Lott,et al.  Impact of the Oxide-Aperture Diameter on the Energy Efficiency, Bandwidth, and Temperature Stability of 980-nm VCSELs , 2015, Journal of Lightwave Technology.

[13]  P. Moser,et al.  81 fJ/bit energy-to-data ratio of 850 nm vertical-cavity surface-emitting lasers for optical interconnects , 2011 .

[14]  P. Westbergh,et al.  Impact of Photon Lifetime on High-Speed VCSEL Performance , 2011, IEEE Journal of Selected Topics in Quantum Electronics.