Toward an accurate frequency standard at 1.5 μm based on the acetylene overtone band transition. - Atsushi Onae; Ken'ichiro Okumura; Jun Yoda; Ken'ichi Nakagawa; Atsushi Yamaguchi; Motonobu Kourogi; Kazuhiro Imai; Bambang Widiyatomoko (IEEE Trans. Instrum. Meas., 1999)