| 摘要 |
A portable apparatus for measuring optical powers of optical signals propagating concurrently in opposite directions in an optical transmission path between two elements, at least one of the elements being operative to transmit a first optical signal (S1) only if it continues to receive a second optical signal (S2) from the other of said elements, comprises first and second connector means for connecting the apparatus into the optical transmission path in series therewith, and propagating and measuring means connected between the first and second connector means for propagating at least the second optical signal (S2) towards the one of the elements, and measuring the optical powers of the concurrently propagating optical signals (S1, S2). The measurement results may be displayed by a suitable display unit. Where one element transmits signals at two different wavelengths, the apparatus may separate parts of the corresponding optical signal portion according to wavelength and process them separately. |
| 主权项 |
1. A portable test instrument for measuring an optical power of each of a first optical signal (S1) and a second optical signal propagating concurrently in opposite directions in an optical transmission path (16, 16/1, . . . , 16/9) between two network elements (10, 14/1, . . . , 14/9), at least one (14/1, . . . , 14/9) of the network elements being operative to transmit the first optical signal (S1) only if it continues to receive the second optical signal (S2) from the other (10) of said network elements, the portable test instrument comprising first and second connector means (22, 24) for temporarily connecting the portable test instrument into the optical transmission path in series therewith, and propagating and measuring means (32, 38, 46) connected between the first and second connector means for propagating at least said second optical signal (S2) towards said at least one (14) of the network elements, the propagating and measuring means (32, 38, 46) being operable to measure an optical power of each of the first optical signal (S1) and the second optical signal (S2)
wherein the propagating and measuring means comprises coupler means (32) having first and second ports (28,30) connected to the first and second connector means, respectively, so that a path therebetween within the coupler means completes the optical transmission path, a third port (36) for outputting a portion of each optical signal received via the second port (30) and a fourth port (34) for outputting a portion of each optical signal received via the first port (28) and detection means (38, 42, 44) coupled to the third and fourth ports for converting the optical signal portions into corresponding electrical signals. |
