Compact heat insulation directional coupler

• Main Authors: LIANG TULU, HUANG RENYAO, HE YUMO, LI SIYI, WANG BAIYU, XIAO ZIYE, SHI YAQIAN
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2024
• Subjects: OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

The invention belongs to the technical field of integrated photoelectronics, and particularly relates to a compact heat insulation directional coupler. According to the adiabatic directional coupler, only one super mode, namely the lowest-order even mode or the lowest-order odd mode, in the two asymmetric waveguides can be excited at the input end, and the super mode is coupled to the same-order super mode in the two symmetric waveguides at the output end, so that uniform power distribution is realized in a relatively wide working bandwidth; the heat insulation directional coupler can also work reversely, under the condition, all energy stays in an excited super mode, and when light is transmitted in the heat insulation directional coupler, mode interference and mode conversion are avoided. The thermal insulation directional coupler provided by the invention realizes the design of an ultra-compact device, can be used for cascading different functional units in a photonic integrated chip, and realizes the desi