Systems and methods for optical communication with polarization diversity

The bidirectional optical transceiver addresses DGD in single mode fibers by using a single receiver module with PSR and delay unit, synchronizing orthogonal mode signals and minimizing component size, thus enhancing signal quality and reducing footprint in optical communication systems.

WO2026128501A1 Publication Date: 2026-06-18LIGHTMATTER INC
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LIGHTMATTER INC
Filing Date
2025-12-09
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Conventional optical communication systems face challenges with polarization-dependent optical effects, particularly differential group delay (DGD) in single mode fibers, leading to signal quality loss and increased component size due to duplicate photonics for different polarization modes.

⚗Method used

A bidirectional optical transceiver design using a single receiver module with polarization splitter rotator (PSR) and delay unit to synchronize orthogonal mode signals, employing passive and active components to compensate for DGD, reducing the need for duplicate photonics and minimizing footprint.

🎯Benefits of technology

The solution effectively compensates for DGD, maintaining signal quality and reducing the physical size of the receiver components, while supporting bidirectional communication with polarization diversity.

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Abstract

Described herein are systems and techniques for a bidirectional polarization diverse optical transceivers. When an optical signal propagates along a single mode fiber, the single polarization mode gets rotated and may arrive at an optical transceiver with an arbitrary superposition of two orthogonal polarization modes, each of which experience differing optical effects. The bidirectional optical transceivers described herein include one or more features for addressing the differing optical effects so that both polarization modes are received at substantially a same time.
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