Patent Document ID: 9210487
Application ID: 14644797
Patent Flag: 1

Claim One:
1. An optical circuit switching device, comprising: a first stage including a first plurality of 2n by 2n optical circuit switching modules; a second stage including a second plurality of 2n by 2n optical circuit switching modules, the second plurality of optical circuit switching modules being fewer than the first plurality of optical circuit switching modules; a first plurality of optical fibers interconnecting ports of the first and second pluralities of optical circuit switching modules in a two-stage folded CLOS topology; wherein each optical circuit switching module of the first stage includes a power monitoring mechanism configured to perform end-to-end power monitoring across at least one optical circuit switching module of the first stage and at least one optical circuit switching module of the second stage; and wherein none of the optical circuit switching modules of the second stage includes a power monitoring mechanism.