摘要 |
A method for calibrating a preferred disposition for a moveable first mirror (26A) of an optical switch core (18) of a photonic crossconnect device (10) relative to a second mirror (26B) thereof, the method comprising the steps of determining approximate geometric coordinates of the first mirror (26A) relative to the second mirror (26B), effecting a laser light crossconnection between the first and second mirrors to produce data from which to provide first order corrections to refine the geometric coordinates, and effecting a further laser light crossconnection between the first mirror (26A) and a third mirror (26), to produce data from which to provide second order corrections to further refine the geometric coordinates, whereby to calibrate the first mirror (26A) such that upon initiation of a laser light crossconnection involving the first mirror (26A), a switching element (32) detects deviation of the first mirror (26A) from the preferred disposition thereof and effects corrective changes. |