A modulation device for directing a mobile tracking device away from an asset is provided. The modulation device includes a continuous wave laser source whose output is directed at a seeker head of the mobile tracking device. The modulation device causes the generation of localized sources within the mobile tracking device and confuses the mobile tracking device as to the true location of the asset. A portable cutting device is disclosed. The portable cutting device may include a portable power supply and a laser source. The portable power supply and laser source of the portable cutting device may be positioned within a backpack and carried by a user. A handheld unit which is coupled to the laser source may be supported by the hands of the operator. The handheld unit provides power generated by the laser source to a barrier to be cut.