Optical sensing device

The invention provides an optical sensing device. The optical sensing device includes: a substrate including a first material; an absorption region including a second material different from the first material, the absorption region configured to receive an optical signal and generate an optical carrier in response to receiving the optical signal; a multiplication region formed in the substrate and configured to collect at least a portion of the optical carriers from the absorption region and multiply a portion of the optical carriers; a buried doped region formed within the substrate and separated from the absorption region, where the buried doped region is configured to collect at least a portion of the multiplied optical carriers from the multiplication region; and the buffer layer is formed between the buried doped region and the absorption region, the buffer layer is an intrinsic layer, and the thickness of the buffer layer is not less than 150 nm. 本申请提供一种光学传感装置。光学传感装置包括：一基板，包括一第一材料；一吸收区，包括一不同于第一材料的第二材料，