In an aspect of the invention, a stimulation device is presented, the device comprising: a probe attached to a first support, the probe comprising at least one grating coupler for coupling light into the probe； and at least one optical source for providing an optical stimulation signal mounted on a second support； and at least one means for detachably attaching the first support to the second support； and wherein the position of the at least one optical source is aligned with the position of the at least one grating coupler to allow light emitted from the at least one optical source to be received by the at least one grating coupler.
