In our set-up (shown if Fig. 1) we use a grating-stabilized pump laser with a wavelength of 404 nm and a bandwidth of 5 MHz (Toptica Bluemode) to pump a 30 mm potassium titanyl phosphate (PPKTP) crystal phase matched for Type-II SPDC.
In our set-up (shown if Fig. 1) we use a grating-stabilized pump laser with a wavelength of 404 nm and a bandwidth of 5 MHz (Toptica Bluemode) to pump a 30 mm potassium titanyl phosphate (PPKTP) crystal phase matched for Type-II SPDC.