Air-cooled laser device having heat-transfer member with heat radiating fins

An air-cooled laser device, the air-cooled laser device comprises:

• a housing including:
• a laser diode module,
• a plurality of heat radiating fins attached to a common heat-transferring member thermally connected to the laser diode module via a heat-receiving member, the plurality of heat radiating fins including a first fin set and a second fin set adjacent to the first fin set, and
• at least one of a first fan adjacent to the first fin set for sending air through the plurality of heat radiating fins of the first fin set in a first flow direction, and a second fan adjacent to the second fin set for sending air through the plurality of heat radiating fins of the second fin set in a second flow direction generally opposite the first direction,
• wherein the heat transferring member, the first and second fin sets, and the first and second fans are positioned in the housing, and
• wherein at least 50 volume percent, among the air flowing through the heat radiating fins of the first fin set, flows through the heat radiating fins of the second fin set prior to flowing through the heat radiating fins of the first fin set again;
• and
• a cooling unit for cooling the air heated by the laser diode module, and
• wherein the housing and the cooling unit are a closed system with a substantially sealed structure, and are connected to each other through an inlet port for transferring the air heated by the laser diode module to the cooling unit, and an outlet port for discharging the cooled air into the housing.