An orchestrator includes: a communication request reception unit that receives a communication requirement from a first computer; an optical transport NW design unit that determines an optical path to be used for communication based on the communication requirement and a state of an optical transport path of an optical transport network and calculates setting information to be set to an optical network device of each of a plurality of nodes to construct the optical path; a result output/transmission unit that transmits the setting information to the optical network device to each of the plurality of nodes; and an ACK transmission unit that transmits the setting completion notification to the first computer after receiving a setting completion response of the setting information from the plurality of nodes.

A dense wave division multiplex (DWDM) receiver includes receiver lanes each configured to detect signals encoded in a different electromagnetic frequency band. The DWDM receiver applies a clock signal received on a variable one of the receiver lanes to lock a frequency of an injection locked oscillator (ILO) of a clock distribution network, and receiver lanes that are configured to receive data signals generate resonance on the clock distribution network. The resonant signal from the clock distribution network is applied to sample the received data signals.