25 February 2016 Coherent THz wave combiner composed of arrayed uni-traveling carrier photodiodes and planar lightwave circuit
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Abstract
For high-power THz wave generation by photomixing of two lightwaves, we proposed the synchronous power combiner which consists of eight-arrayed photomixers/antennas and the THz phase control system. We experimentally confirmed the effectiveness of the power combination by synchronizing the phases of the THz wave by the mechanical optical delay lines and also demonstrated the same functionality at the lightwave-circuit-based optical phase control system. We found that the directional gain is increasing with increasing the number of photomixers from two to three and it reached up to 4.5 dB.
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K. Sakuma, J. Haruki, G. Sakano, K. Kato, S. Hisatake, T. Nagatsuma, "Coherent THz wave combiner composed of arrayed uni-traveling carrier photodiodes and planar lightwave circuit", Proc. SPIE 9747, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications IX, 97471O (25 February 2016); doi: 10.1117/12.2212017; https://doi.org/10.1117/12.2212017
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