Wavelength separated fine steering assembly

A method comprising:

• while in a first operational mode:
• receiving, from a first light coupling port, a first outgoing signal at a first wavelength, wherein the first outgoing signal is an optical communication signal;
• reflecting, by a first dichroic reflector, the first outgoing signal via a fine steering module to a target terminal;
• passing, by the first dichroic reflector, a first incoming signal at a second wavelength from the target terminal to a second dichroic reflector;
• substantially passing, by the second dichroic reflector, the first incoming signal at the second wavelength to a second light coupling port;
• reflecting, by the second dichroic reflector, a portion of the first incoming signal at the second wavelength from the first dichroic reflector;
• and
• while in a second operational mode:
• receiving, from the second light coupling port, a second outgoing signal at the second wavelength;
• passing, by the second dichroic reflector, the second outgoing signal to the first dichroic reflector;
• passing, by the first dichroic reflector, the second outgoing signal to the target terminal via the fine steering module;
• and
• reflecting, by the first dichroic reflector a second incoming signal at the first wavelength from the target terminal to the first light coupling port.

A system comprising:

• an optical transceiver configured to transmit and receive free space optical communication signals and comprising a first light coupling port and a second light coupling port;
• an optical communication device, configured for duplex communication, the device comprising:
• a first dichroic reflector configured to substantially reflect a first wavelength and pass a second wavelength and a portion of the first wavelength;
• a second dichroic reflector configured to substantially pass the second wavelength and reflect the first wavelength and a portion of the second wavelength, wherein the second dichroic reflector is located between a second light coupling port and the first dichroic reflector, and
• a fine steering module, wherein:
• while the device is in a first operational mode, the first dichroic reflector is configured to:
• substantially reflect a first outgoing signal at the first wavelength from a first light coupling port to the fine steering module, and
• to pass a first incoming signal at the second wavelength from the fine steering module to the second dichroic reflector, and
• while the device is in a second operational mode, the first dichroic reflector is configured to:
• substantially reflect a second incoming signal at the first wavelength from the fine steering module to the first light coupling port;
• pass a portion of the second incoming signal at the first wavelength from the fine steering module to the second dichroic reflector;
• and
• pass a second outgoing signal at the second wavelength from the second dichroic reflector to the fine steering module, and wherein the second dichroic reflector is configured to:
• substantially pass the first incoming signal at the second wavelength from the first dichroic reflector to the second light coupling port and to reflect a portion of the first incoming signal at the second wavelength from the first dichroic reflector during the first operational mode;
• and
• reflect the portion of the second incoming signal at the first wavelength from the first dichroic reflector and to substantially pass the second outgoing signal at the second wavelength from the second light coupling port to the first dichroic reflector during the second operational mode.