A method for attaching at least one optical fiber to a chip includes the steps of: providing at least one nanowaveguide of a chip including at least one nanowaveguide end to be attached to at least one off-chip fiber respectively; forming at least one oxide taper over or adjacent to each of the at least one nanowaveguide end; cleaving at least one fiber end; aligning the chip so that an end face of each of the at least one oxide taper is mechanically aligned substantially adjacent to each corresponding cleaved fiber end; and fusing each of the at least one oxide taper with each of the at least one fiber end respectively to modally couple each of the nanowaveguides to each of the at least one fiber end via each of the oxide tapers. A device for attaching at least one optical fiber to a chip is also described.