A holographic light-emitting module includes a light source module and a light shape control module. The light source module is configured to provide a signal light beam and a reference light beam, in which polarizations of the signal light beam and the reference light beam are orthogonal. The light shape control module is configured to receive the signal light beam and the reference light beam propagated from the light source module, in which the signal light beam and the reference light beam are modulated and emitted by the light shape control module The reference light beam is surrounded by the signal light beam and located at a center of the signal light beam, and the signal light beam and the reference light beam are partially overlapped.

An apparatus includes a slider of a recording head comprising a plurality of electrical bond pads coupled to bias sources and a ground pad. Each of a plurality of electrical components of the slider is coupled to at least one of the electrical bond pads. At least one of the electrical bond pads is a shared electrical bond pad coupled to at least two of the electrical components. At least one diode is coupled to at least one of the electrical bond pads and at least one of the electrical components.

An apparatus includes a slider of a recording head comprising a plurality of electrical bond pads coupled to bias sources and a ground pad. Each of a plurality of electrical components of the slider is coupled to at least one of the electrical bond pads. At least one of the electrical bond pads is a shared electrical bond pad coupled to at least two of the electrical components. At least one diode is coupled to at least one of the electrical bond pads and at least one of the electrical components.