Widely tunable external-cavity surface-emitting laser using various methods

Abstract

We report a widely tunable optically pumped vertical-external-cavity surface-emitting laser. The multiple quantum wells in the active region of the gain chip are generally designed to form the resonant periodic gain structure, and three different methods are used to tune the oscillating wavelength. The maximum wavelength coverage of 45 nm is obtained when a 2 mm thickness birefringent filter is introduced in a straight-line cavity, while the tuning range of 8 nm is performed by employing a 0.15 mm thickness uncoated Fabry–Perot etalon. For the first time, to the best of our knowledge, we present an 11 nm tuning range by the use of an inserted blade as the tuning element, and the related wavelength tuning mechanism is analyzed.

Temperature-Stabilized and Widely Tunable Vertical External Cavity Surface-Emitting Laser With a Simple Line Cavity

“…1. Comparison of tuning range as a function of output power near 1um for VECSEL: the green balls are for DBRfree/MECSELs [17][18][19][20], the black balls are for quantum dot VECSELs [21], the blue balls are for VECSEL with fold cavity [10,[22][23][24], the red balls are for VECSEL with linecavity [12,25,26], the red star is VECSEL with line-cavity in this paper. There are various ways to realize the widely tuning VECSEL.…”