Continuous tuning of an electrically tunable external-cavity semiconductor laser.
We propose and demonstrate a novel approach to achieving rapid and phase-coherent continuous broadband tuning of a single-mode external-cavity semiconductor laser. Two internal acousto-optic devices control the angle of incident light on a diffraction grating and the effective round-trip phase electronically. Although the present implementation derives the phase from a long delay line and is not yet mode-hop free, the new approach lends itself to fully electronic control.
Kourogi
M
M
Imai
K
K
Widyatmoko
B
B
Shimizu
T
T
Ohtsu
M
M