Wideband Impulse Response Measurement of Coupled 2-Core Fibers of Various Lengths employing Dual-Comb Coherent Sampling. - Masafumi Uyama; Masaki Uno; Shuki Okamura; Chao Zhang; Fumihiko Ito; Atsushi Nakamura; Tatsuya Okamoto; Yusuke Koshikiya (OFC, 2022)