A technique for providing an optical signal to a destination. In the invention, after pasting a fixing substrate, a part of a glass substrate is removed by scribing or performing laser irradiation on the glass substrate which leads to providing a trigger. An engine valve is spring-loaded by a valve spring, whereas the cam opens or closes the engine valve against the bias of the spring. An ejector assembly is also provided to releasably engage the drawbar assembly connected to the container.