Patent ID: 7445390

Claim:
A method comprising: identifying a predetermined optical characteristic for an optical module; providing an optical module having an initial optical path, and a modifiable optical element, wherein the modifiable optical element includes an optical interface in the initial optical path, and an optical receiving part permanently positioned in the optical module; generating an optical signal; detecting the optical signal in the initial optical path through the optical receiving part; and irreversibly modifying the optical interface to generate a modified optical interface of the modifiable optical element, wherein the modification of the optical interface is performed in response to the detected optical signal so as to obtain substantially the predetermined optical characteristics for the optical module; wherein the modifying is performed so as to obtain substantially an optical characteristic selected from the group consisting of: a predetermined coupling efficiency between fibres, a predetermined degree of collimation, a predetermined shape of a radiation beam obtained in the optical module, and a predetermined overlap between a radiation beam obtained in the optical module and a detector surface.