Contact-bonded epoxy-resin lenses to fibre endfaces

A method of contact-bonding lenses to fibre endfaces is outlined. The lenses are of the same diameter as the fibre. Contact bonding reduces the adjustment effort compared with that required for independent lenses. Measurements performed on fibres with contact-bonding lenses using a GaAs laser diode as a light source showed a clear increase in coupling efficiency for the launching of light into the fibre.