  Optical fiber links have demonstrated their ability to transfer the
ultra-stable clock signals. In this paper we propose and demonstrate a new
scheme to transfer both time and radio frequency with the same wavelength based
on coherent demodulation technique. Time signal is encoded as a binary
phase-shift keying (BPSK) to the optical carrier using electro optic modulator
(EOM) by phase modulation and makes sure the frequency signal free from
interference with single pulse. The phase changes caused by the fluctuations of
the transfer links are actively cancelled at local site by optical delay lines.
Radio frequency with 1GHz and time signal with one pulse per second (1PPS)
transmitted over a 110km fiber spools are obtained. The experimental results
demonstrate that frequency instabilities of 1.7E-14 at 1s and 5.9E-17 at 104s.
Moreover, time interval transfer of 1PPS signal reaches sub-ps stability after
1000s. This scheme offers advantages with respect to reduce the channel in
fiber network, and can keep time and frequency signal independent of each
other.
