| US 7,596,290 B2 | ||
| Optical-switch testing apparatus, optical-signal switching apparatus, optical-switch testing method, and control method for optical-signal switching | ||
| Yoshio Sakai, Kawasaki (Japan); Yuji Tochio, Kawasaki (Japan); Kazuyuki Mori, Kawasaki (Japan); and Atsuo Ishizuka, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Jun. 12, 2007, as Appl. No. 11/761,958. | ||
| Application 11/761958 is a division of application No. 10/876645, filed on Jun. 28, 2004, granted, now 7,239,773. | ||
| Prior Publication US 2007/0230954 A1, Oct. 04, 2007 | ||
| Int. Cl. G02B 6/26 (2006.01); G02B 6/42 (2006.01); G02F 1/29 (2006.01); G01R 31/08 (2006.01); G06F 11/00 (2006.01); G08C 15/00 (2006.01); H04B 10/08 (2006.01); H04B 17/00 (2006.01); H04J 1/16 (2006.01); H04J 3/14 (2006.01); H04L 1/00 (2006.01); H04L 12/26 (2006.01) | ||
| U.S. Cl. 385—18 [385/16; 398/12; 398/19; 370/250; 359/320] | 9 Claims |
| 1. An optical-switch testing method to test optical characteristics of an optical switch that deflects a light path for switching
optical signals between an input port and an output port corresponding to an arbitrary pass, the optical-switch testing method
comprising:
inputting an optical signal for the test to the input port;
detecting light receiving level of the optical signal output from the output port;
changing a deflection status of the light path to obtain an optimal point at which the light receiving level is maximum, whenever
the optical signal is switched; and
calculating a parameter to optimize the deflection status based on the optimal point, including calculating an optical offset
of a first mirror array and a second mirror array based on an angle position of the optimal point, when a light path of a
through pass, in which a port number of the input port is the same as that of the output port, is formed.
|