Coupling for forming an optical plug connection

A coupling for forming an optical plug connection between two optical plug connectors, the coupling comprising:

• a guide sleeve;
• a sleeve-receiving cage with an interior space for receiving the guide sleeve, the sleeve-receiving cage having plug-in openings which are arranged opposite one another on a longitudinal axis of the sleeve-receiving cage and which serve for the plugging-in of in each case one ferrule of the respective optical plug connector into the guide sleeve in, in each case, one direction parallel to the longitudinal axis;
• longitudinal stops of the sleeve-receiving cage at least regionally surround each of the plug-in openings, the longitudinal stops of the sleeve-receiving cage are adapted to prevent the guide sleeve from being pulled out of the interior space of the sleeve-receiving cage;
• and
• the sleeve-receiving cage having two sleeve-receiving cage parts, and the sleeve-receiving cage parts having in each case one detent connection part for forming a detent connection, the detent connection parts for the fastening of the sleeve-receiving cage parts to one another are engagable into one another with detent action upon the sleeve-receiving cage parts being slid onto one another in the direction parallel to the longitudinal axis.