  In this work, we develop a high energy laser at 1.4 {\mu}m wavelength through
the 1st order vibrational Raman Stokes generation in a nitrogen (N2) filled
nodeless anti-resonant hollow core fiber (ARHCF), pumped using a custom-made
1060 nm Yb-doped narrow-linewidth fiber laser with 3.7 ns pulse duration and 98
{\mu}J pulse energy. The maximum Raman energy of 26.5 {\mu}J is achieved at 15
bar N2 pressure, corresponding to a quantum efficiency of 45% and peak power of
8.03 kW with 3.3 ns pulse width. This Raman laser has a narrow linewidth of
0.16 nm, and it is tunable over ~2 nm range by thermally tuning the laser diode
seed wavelength of the pump fiber laser. This work provides a promising
alternative for developing high energy and narrow-linewidth lasers outside the
gain spectral regions of rare earth ion doped fibers.
