Optical frequency mixing module

An optical frequency mixing module comprising:

• a nonlinear medium for frequency mixing the photons of one or more input optical fields to generate an output optical field;
• a nonlinear medium tuner that provides a means for phase matching the nonlinear medium to the one or more input optical fields to select a wavelength of the output optical field generated by the nonlinear medium;
• a first direction correcting optic;
• and
• an optical field separating device located between the nonlinear medium and the first direction correcting optic that provides a means for spatially separating the one or more input optical fields not converted by the nonlinear properties of the nonlinear medium from the output optical field and that prevents the one or more input optical fields from propagating through the first direction correcting optic,
• wherein the position of the first direction correcting optic relative to the nonlinear medium is dependent upon the selected wavelength of the output optical field to ensure that the position and angle of propagation of the output optical field remains constant.