Adiabatically tapered splice for selective excitation of the fundamental mode in a multimode fiber.
We propose a simple and effective method to selectively excite the fundamental mode of a multimode fiber by adiabatically tapering a fusion splice to a single-mode fiber. We experimentally demonstrate the method by adiabatically tapering splice (taper waist=15 microm, uniform length=40 mm) between single-mode and multimode fiber and show that it provides a successful mode conversion/connection and allows for almost perfect fundamental mode excitation in the multimode fiber. Excellent beam quality (M(2) approximately 1.08) was achieved with low loss and high environmental stability.
Jung
Yongmin
Y
Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK. ymj@orc.soton.ac.uk
Jeong
Yoonchan
Y
Brambilla
Gilberto
G
Richardson
David J
DJ