Design of double wavelengths fiber coupled module of semiconductor diode laser by ZEMAX

In order to make full use of the advantages of single emitter semiconductor diode laser and obtain a light beam of more wavelengths, higher power, higher optical power density, a fiber coupled diode laser module was designed, which consisted of 32 single emitter semiconductor diode lasers using incoherent multiplexing by ZEMAX. The wavelengths of semiconductor diode laser were 975 nm and 915 nm, the power was 15 W. After the simulation of fast axis collimation, slow axis collimation, spatial multiplexing, polarization multiplexing, wavelength multiplexing, focusing and fiber coupling, this module can produce 467.46 W from a standard optical fiber with core diameter of 200 m and numerical aperture(NA) of 0.22. The coupling efficiency before-after fiber was above 98.47%, the total coupling efficiency was above 97.39%. The optical power density was above 12.86 MW/(cm2sr), module can be used as pump laser and high power device. The corresponding packaging structure was designed by Solidworks and its thermal performance was simulated by ANSYS. The final result demonstrates that this module plays a great heat dissipation performance and is of high feasibility.