1.5-μm Directly modulated transmission over 66 km of SSMF with an integrated hybrid III-V/SOI DFB laser

Abstract

Peucheret, C. (2017). 1.5-m Directly modulated transmission over 66 km of SSMF with an integrated hybrid III-V/SOI DFB laser. In Proceedings of the 2017 IEEE 14th International Conference on Abstract: A hybrid III-V/SOI directly modulated DFB laser operating at 1.5 μm is fabricated, showing a side mode suppression ratio above 50 dB and a 3-dB bandwidth of 12 GHz. Error-free transmission (BER<10 -9 ) at 10 Gb/s over 66-km SSMF is demonstrated without dispersion compensation and FEC. IntroductionThe significant growth of internet traffic in recent years has been driving a strong research effort on low-cost highspeed solutions for access networks. In order to reduce the network cost and complexity, the focus has been directed towards finding integrated and compact solutions capable of reaching transmission distances above 40 km of standard single mode fiber (SSMF), which could still satisfy the stringent energy and cost requirements [1].Among different platforms, silicon photonics has emerged as the most promising candidate for the integration of photonic and electronic integrated circuits [2,3]. Furthermore, thanks to advances in integration of III-V materials on the silicon-on-insulator (SOI) platform [3,4], high-speed transceivers have been demonstrated [4,5].Directly modulated lasers (DMLs) have been recognized as good candidates for short reach (≤ 10 km) applications thanks to their higher emitted power and lower power consumption compared to integrated externally modulated lasers (EMLs). EMLs can usually reach higher modulation speeds and are preferable for applications with a reach above 10 km that take advantage of their higher extinction ratio (ER) and lower frequency chirp compared to DMLs [6]. However, there is a trade-off between low frequency chirp and emitted power in such devices [7], which has an impact for achieving error-free performance over distances above 40 km and in high loss budget situations [8].To extend the reach, either transmission in the O-band [9] or digital signal processing (DSP) [9, 10] is typically used. However, transmitting in the O-band will increase the losses, affecting the power budget for extended reach (> 40 km) applications, while DSP will increase the latency and power consumption. Therefore, DMLs that can transmit over such distances at 1.5 μm are highly desirable.In this work, we report on an integrated 1.5-μm hybrid III-V/SOI DML operating at 10 Gb/s capable of transmitting over 66 km of SSMF without any dispersion compensation, equalization and FEC.

High Speed Evanescent Quantum‐Dot Lasers on Si

“…At that point, large signal eye diagrams, modulation transmission measurements will be conducted to fully evaluate the device characteristics. [ 43,44 ] As for the laser linewidth, note that the evanescent QD DFBs here do not include any external cavity designs or facet coatings. Therefore, compared to the heterogeneous QW‐based DFB, the reduction in linewidth here is mainly contributed from the QD aspect.…”