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A laser enhanced direct print additive manufacturing process is proposed for 3D printing optical interconnects An optical interconnect is directly printed on a circuit board for the first time using this process Transmitted optical power of the 3D printed optical fiber interconnects is 63 % of that of a commercial fiber in these preliminary prototypes Processing conditions are established using fluid flow and heat transfer modeling Integrated photonics have many compelling advantages for computing and communication applications , including in high-speed and extremely wide bandwidth operations .
 manufacturing process: laser enhanced direct print additive manufacturing; manufacturing process: 3D printing; process characterization: optical; concept or principle: process; process characterization: optical; manufacturing process: 3D printed; material: fiber; material: fiber; concept or principle: prototypes; machanical property: fluid flow; concept or principle: heat transfer
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: laser enhanced direct print additive manufacturing, 3D printing, optical, process, optical, 3D printed, fiber, fiber, prototypes, fluid flow, heat transfer 
Answer:
 manufacturing process: laser enhanced direct print additive manufacturing; manufacturing process: 3D printing; process characterization: optical; concept or principle: process; process characterization: optical; manufacturing process: 3D printed; material: fiber; material: fiber; concept or principle: prototypes; machanical property: fluid flow; concept or principle: heat transfer