Single-fiber bidirectional optical assembly

A single-fiber bidirectional optical assembly, comprising:

• an optical emitter, an optical receiver, a lens assembly, a first filter, and an optical fiber interface end,
• wherein the optical fiber interface end is used for being connected to an optical fiber, a downlink optical signal emitted by the optical emitter is focused by the lens assembly, the focused downlink optical signal is emitted to the optical fiber sequentially through the first filter and the optical fiber interface end, and is then transmitted by the optical fiber;
• wherein an uplink optical signal transmitted by the optical fiber is reflected by the first filter and is then received by the optical receiver;
• and
• wherein the single-fiber bidirectional optical assembly further comprises at least one optical power attenuator, the optical power attenuator is arranged between the optical emitter and the optical fiber interface end, and a transmittance of the optical power attenuator varies with a wavelength of an optical signal,
• wherein the transmittance of the optical power attenuator increases as the wavelength of the optical signal increases, the optical emitter is a semiconductor laser, the transmittance of the optical power attenuator increases linearly as the wavelength of the optical signal within a range from a first wavelength to a second wavelength increases, wherein the first wavelength is less than a wavelength lower limit of the downlink optical signal emitted by the semiconductor laser within an operating temperature range, and the second wavelength is greater than a wavelength upper limit of the downlink optical signal emitted by the semiconductor laser within the operating temperature range.