We propose a novel force sensor applied to the precise measurement of axial contact forces between the tip of a surgical instrument and biological tissue during minimally invasive surgery (MIS) palpation procedures. The sensor incorporates a linearly chirped fiber Bragg grating (LCFBG), with a portion of the grating bonded at both ends and suspended at the center of an elastic hollow structure, while the remaining section is left free and unaffected by axial forces. This distinctive structural d