An amplified broadband optical signal is produced in a transmission system. In an implementation, a search query is a received and a context is detected of a user interface currently being displayed on a display device of a mobile communication device. The heat dissipation member is thermally bonded to the heat generating element and to the casing. The putter has an aiming mark that has a minimum area and a minimum length-to-width ratio and is brightly colored. The second optical touch sensor devices are disposed on the first substrate and at least corresponding to part of the sub-pixel regions for implementing touch input function on the second display surface. More particularly, a laser sensitometer.