A ytterbium fibre laser (λ= 1.07 μm) based laser heated diamond anvil cell (LHDAC) facility has been recently set up at HP&SRPD, BARC for simultaneous high temperature and high pressure investigation of material properties. Synthesis of GaN was carried out at pressure of ~ 9 GPa and temperature of ~1925 K in a Mao-Bell type diamond anvil cell (DAC) using the LHDAC facility. The retrieved sample has been characterized using our laboratory based micro Raman setup.