def get_optics(self):
raise NotImplementedError<EOL>
Fetches the power usage on the various transceivers installed
        on the switch (in dbm), and returns a view that conforms with the
        openconfig model openconfig-platform-transceiver.yang

        Returns a dictionary where the keys are as listed below:

            * intf_name (unicode)
                * physical_channels
                    * channels (list of dicts)
                        * index (int)
                        * state
                            * input_power
                                * instant (float)
                                * avg (float)
                                * min (float)
                                * max (float)
                            * output_power
                                * instant (float)
                                * avg (float)
                                * min (float)
                                * max (float)
                            * laser_bias_current
                                * instant (float)
                                * avg (float)
                                * min (float)
                                * max (float)

        Example::

            {
                'et1': {
                    'physical_channels': {
                        'channel': [
                            {
                                'index': 0,
                                'state': {
                                    'input_power': {
                                        'instant': 0.0,
                                        'avg': 0.0,
                                        'min': 0.0,
                                        'max': 0.0,
                                    },
                                    'output_power': {
                                        'instant': 0.0,
                                        'avg': 0.0,
                                        'min': 0.0,
                                        'max': 0.0,
                                    },
                                    'laser_bias_current': {
                                        'instant': 0.0,
                                        'avg': 0.0,
                                        'min': 0.0,
                                        'max': 0.0,
                                    },
                                }
                            }
                        ]
                    }
                }
            }