Optical module for bi-directional monochromatic transmission

An optical module for bi-directional monochromatic transmission, comprising:

• a substrate comprising a multi-level structure;
• a common terminal adjacent to the substrate and connected to an optical fiber;
• a circulator module on the substrate and in free space optical communication with the common terminal;
• a multiplex-demultiplex (MDM) module on the substrate and in free space optical communication with the circulator module;
• and
• an input-output terminal on the substrate and in free space optical communication with the MDM module, the input-output terminal being configured to connect to an emitter and a receiver,
• wherein the circulator module and the MDM module are at different levels of the substrate.

An optical module for bi-directional monochromatic transmission, comprising:

• a substrate;
• a common terminal adjacent to the substrate and connected to an optical fiber;
• a circulator module on the substrate and in free space optical communication with the common terminal;
• a multiplex-demultiplex (MDM) module on the substrate and in free space optical communication with the circulator module;
• and
• an input-output prism on the substrate and in free space optical communication with the MDM module, the input-output prism being configured to establish optical communication between the MDM module and an emitter or a receiver outside of the optical module;
• wherein the input-output prism comprises a right angle prism structure configured to refract a first directional transmission prior to entering the receiver and a Rhomboid prism configured to refract a second directional transmission after transmitting from the emitter.