A tunable optical transmitter, comprising a tunable laser comprising a distributed Bragg reflector section, a phase section, and a gain section, a photodiode detector optically coupled to the tunable laser, wherein the tunable optical transmitter lacks a temperature controller, and wherein the tunable optical transmitter is configured to lock onto a wavelength at different operating temperatures. The patient interacts with the system through the patient interactive computer. The pin plate has alignment ball receptacles on its surface and the reservoir has alignment balls on its surface facing the pin plate.