The Research Of Multifunctional Integrated Optical Chip Based On VCL Laser

In recent years,with the expanding coverage of China's network and increased capabilities of transmission and access,significant progress has been made in the communication technology with the help of complete formation of the industrial chain and the development of service industry.Many applications,such as Internet of things,computing cloud,data center,terminal service,network on car,wireless network and visible light communications,will blowout the development of network traffic.Wavelength routing technology can greatly improve the reliability of optical communication network,which does not need to constitute a light channel in the various links.As long as spare channel in links is available,a new light path can be formed by using the idle wavelength.This wavelength routing technology,including wavelength conversion technology and optical switch technology,can improve the wavelength utilization and effectively solve the problem of the competition in optical switch and dynamic routing scheme.Thus they can reduce the network blocking rate,improving the flexibility of network.In this program,we have proposed an all-optical wavelength conversion and routing system for all-optical network aim at obtaining the integration of different active and passive devices on the same chip based on VCL laser,so that it is possible to realize the function of amplifying,processing,wavelength conversion and forwarding routing in a certain wavelength range.In this thesis,the V-Coupled Cavity Laser(VCCL)is a half-wave-coupler-based device that achieves a wide tunable range and a high side mode suppression ratio(SMSR)by using vernir effect with small length difference of two cavities.With simple fabrication,VCL does not require grating and is very easy to integrate with other devices.In this paper,we design and propose a variety of schemes to achieve the better performance of VCL semiconductor lasers including expansion of tuning range,reduction of line width,quasi-continuous tuning and chirp control method.This low-cost,high-performance tunable laser and multi-functional,large-scale integrated optical device attract the attention from world and become a major trend.In this thesis,the SOA-XPM-based wavelength conversion combinated with delayed Mach-Zehnder interferometric(DI-MZI)is proposed with integration of V-coupled cavity lasers,delay line,multimode interference coupler(MMI),SOAs,passive coupler and other devices.Time-domain traveling wave model is used to analyze the two models of wavelength convertors which can realize the all-optical wavelength conversion of 40Gb/s return-to-zero pattern transmission.In this thesis,with the demand of monolithic integration,we aim to solve the problem of incompatibility and the complexity of fabrication,by the integration platform of quantum well offset,quantum well intermixing and butt-joint.We have successfully proposed all-optical routing chip,to achieve 2.5G all-optical wavelength conversion,which is the first demonstration of large-scale photonic integration for advanced all-optical routing functions in China,further narrowing the gap with the world's advanced research level.All in all,the design and implementation of high-speed photonic integrated devices can greatly reduce the power consumption and volume of optical network terminal and node device,which is the key technology of next generation of optical network.This thesis focuses on the development of cost-effective semiconductor tunable lasers and its way to industrialization.At the same time,the exploration for the large scale integration for photonic router chip based on VCL lasers may lay the foundation for all-optical routing technology in the future.