Broad tunability of grating coupled surface-emitting laser with external cavity

Abstract

The wavelength tuning properties of an InGaAs Grating Coupled Surface Emitting Laser (GCSEL) are presented. Wide, continuous tunable laser oscillation has been observed over a range of 115nm, between 900nm-1015nm, under pulsed current excitation. Different External Cavities have been studied to achieve the optimal performance.

Hybrid modelocking of external cavity with grating-coupled surface emitting laser

“…Picosecond optical pulse generation from GCSEL is of interest because of their unique characteristics such as wide spectral tunability [1], large output transverse mode properties, and high power based on a GCSEL MOPA system [2]. In addition, an external cavity incorporating a GCSEL can utilize the grating dispersion for spectral filtering, gain flattening [3] and wavelength tuning for a modelocked laser.…”

Widely tunable gain-switched operation of external cavity grating-coupled surface emitting laser

“…Recently, the grating-coupled surface emitting lasers (GCSELs) have become a subject of considerable research interest 1,2 . Due to the built-in off-resonance grating structure, this type of laser offers the advantage of exceptionally good suppression of parasitic feedback as well as a possibility to employ the grating for the broadband spectral control.…”