High power single frequency, single mode, linearly polarized laser output at the 1 µm regime is in demand for the interferometric gravitational wave detectors (GWDs). A robust single frequency solid state master oscillator power amplifier (MOPA) is a promising candidate for such applications. We present a single frequency solid state multistage MOPA system delivering 177 W of linearly polarized output power at 1 µm with 83.5\% TEM00 mode content.