"module_temperature": 37.3477,
        "module_voltage": 3.3406,

Device tree often puts the units in the property name. module_temperature_C, module_voltage_v,  

        "laser_bias_current": {
            "high_alarm_threshold": 13,
            "low_alarm_threshold": 3,
            "high_warning_threshold": 11,
            "low_warning_threshold": 5

             "high_alarm_threshold_mA": 13,

        },
        "laser_output_power": {
            "high_alarm_threshold": 3.1623,
            "low_alarm_threshold": 0.1,
            "high_warning_threshold": 1.9953,
            "low_warning_threshold": 0.1585
        },

             "high_alarm_threshold_W": 3.1623,

        "module_temperature": {
            "high_alarm_threshold": 75,
            "low_alarm_threshold": -5,
            "high_warning_threshold": 70,
            "low_warning_threshold": 0
        },

             "high_alarm_threshold_C": 75,

etc. This makes it more self contained.

	Andrew