This invention provides a control technique of a data processing system, in which functions of a highly-functional high-performance storage system are achieved in an inexpensive storage system so as to effectively use the existing system and reduce the cost of its entire system. The first bellows is formed from a flexible material that is sealingly connected between the first end ring and the middle ring, and it has a twist bias in a first rotational direction relative to an axis of the rings. The device further includes a waveguide region of a stripe structure formed by etching from the p-side contact layer. The separation torsion spring and the engagement members are disposed between the first plate member and the second plate member and maintain a constant distance between the plate members. In addition, the present invention provides a transceiver system including a transceiver cage having radiation control openings with a longest dimension no greater than {fraction } of the wavelength of the electromagnetic radiation corresponding to ten times the highest signal frequency present in the transceiver cavity.