Anamorphic Microlens For Laser Diode To Single-Mode Fibre Coupling

An anamorphic fibre microlens is evaluated for coupling between laser diodes and single-mode fibres. A theoretical model, based on scalar diffraction and Gaussian mode shapes for the laser and fibre fields, is developed to predict the coupling performance of this microlens. Experimentally, the average coupling efficiency of this lens is measured to be 78%. The lateral sensitivity is also measured and compared with the values predicted by the model.