US 12,348,269 B2
Single-fiber bidirectional optical transmission apparatus, wavelength division multiplexing device, and optical transmission system
Wei Liu, Wuhan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Mar. 28, 2023, as Appl. No. 18/191,289.
Application 18/191,289 is a continuation of application No. PCT/CN2021/119666, filed on Sep. 22, 2021.
Claims priority of application No. 202011052565.6 (CN), filed on Sep. 29, 2020.
Prior Publication US 2023/0239052 A1, Jul. 27, 2023
Int. Cl. H04B 10/40 (2013.01); H04J 14/02 (2006.01)
CPC H04B 10/40 (2013.01) [H04J 14/0305 (2023.08)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first single-light-source coherent optical transceiver, configured to:
receive a first optical signal from a first multiplexer/demultiplexer;
convert the first optical signal into a first electrical signal; and
send the first electrical signal to a first apparatus; and
a second single-light-source coherent optical transceiver, configured to:
receive a second electrical signal from the first apparatus;
convert the second electrical signal into a second optical signal;
send the second optical signal to the first multiplexer/demultiplexer, wherein a wavelength of the second optical signal is different from a wavelength of the first optical signal;
receive a third optical signal from a second multiplexer/demultiplexer;
convert the third optical signal into a third electrical signal; and
send the third electrical signal to a second apparatus, wherein a wavelength of the third optical signal is the same as the wavelength of the second optical signal, and the second optical signal and the third optical signal are sent in opposite directions; and
wherein the first single-light-source coherent optical transceiver is further configured to:
receive a fourth electrical signal from the second apparatus;
convert the fourth electrical signal into a fourth optical signal; and
send the fourth optical signal to the second multiplexer/demultiplexer, wherein a wavelength of the fourth optical signal is the same as the wavelength of the first optical signal, and the fourth optical signal and the first optical signal are sent in opposite directions.