Abstract

Frequency shifted feedback(FSF) lasers have been investigated for rapid tuning laser radiation.¹ However, its application is limited because of its wide bandwidth output. With etalon, bandwidth of FSF laser was decreased.² But its tunability was influenced due to detuning of intracavity selector for continuous wavelength tuning. Furthermore, in electronically tuned lasers reported before, dispersive element, such as grating or prism, was required. In this paper, we demonstrate a novel approach for achieving narrowband, electronically tuned laser. Through decreasing the shifted frequency with two AOTFs settled parallel inside the laser cavity, bandwidth of FSF laser has been compressed. At the same time, the laser could be tuned electronically in a wide range without mechanical adjustment or dispersive element.

© 2002 Optical Society of America