Monolithic Integration DFB Laser Array by Angling Active Stripe and Using Thin-Film Stripe Heater

Multi-wavelength quantum well DFB laser array has been fabricated on an InP substrate by angling the active stripe at an oblique angle to the axis of the grating lines and coating a Pt/Ti thin-film heater to change the laser temperature.Owing to the oblique angle,four single-mode lasing wavelengths around 1.55μm were obtained simultaneously.By changing the working of the thin-film heater,the DFB laser can be tuned continuously beyond a range of 2 2nm with 3.8nm/W of tuning efficiency while maintaining...