Wavelength Measurement Of Tunable Semiconductor Laser

Tunable semiconductor laser plays an important role in next-generation optical network communication systems.It is considered as an ideal light source in DWDM systems.It also plays an important role in the future development of optical communication.The wide application prospects of tunable semiconductor lasers make people pay more attention to it.The sampling grating distributed Bragg reflector laser has attracted wide attention due to its fast wavelength tuning speed,wide tuning range and strong expandability.This thesis focuses on the wavelength test and wavelength control of SG-DBR laser.The main work can be divided into the following sections:The structure of the SG-DBR laser chip and the principle of wavelength tuning are described in detail,and the influence of the wavelength control electrode injection currents on the wavelength tuning is analyzed based on this.The influence of gain region and amplification region on output power and wavelength in SG-DBR laser chip is also analyzed in this article.A new test plan is proposed for the difficulty of the wavelength test based on the analysis of two different SG-DBR laser wavelength test methods.With the help of this new test scheme,a set of automated test platform based on LabVIEW was built.The relevant functions and design ideas of each module in the test platform are introduced in this article.The program is continuously optimized in the subsequent testing process,which further increases the test rate and reduces the test cycle.We can get the wavelength calibration of the SG-DBR laser accurately and quickly with the help of this automatic test platform.The calibration data of the test scheme proposed in this paper is compared with the test data obtained by common methods to verify its reliability and effectiveness.The new test scheme has certain reference value for the optimization and mass production of SG-DBR laser chips...