Specifications include, but are not limited to: A turn-key coherent optical communication system testbed for transmission of advanced modulation formats over single-mode fibers (SMFs). The system should be programmable and should be able to generate arbitrary modulation formats and pulse shapes over two orthogonal states of polarization at net bit rates of at least 200 Gb/s using polarization division multiplexing (PDM). An example of such a modulation format is 32 GBd PDMQAM with Nyquist pulses.; A 4-channel arbitrary waveform generator module with the associated Optical Modulation Generation Software with at least 32 GHz bandwidth and maximum sampling rate of at least 90 GSa/s. Two narrow-linewidth (of about 100 KHz) C-band and two L-band tunable laser sources with maximum output power of at least 15 dBm maximum output power each. These sources might be embedded in the dual-polarization IQ optical modulator and the coherent optical receiver described below or might be external. A dual-polarization IQ optical modulator with at least 40-GHz of bandwidth. The modulator should be able to operate in both the C&L bands. An intradyne coherent optical receiver with at least 40-GHz of bandwidth capable of operation in the C&L bands. A real-time, 4-channel, oscilloscope or oscilloscope system composed of multiple interconnected units. The oscilloscope should have at least 40 GHz bandwidth and 200 GSa/s maximum sampling speed.
