The journey of polarization of light: revealing the magic of combining and splitting beams

1. Polarization combiner beam/ splitter definition

PBS/PBC is a device for detachable (movable) connection between optical fibers. It precisely connects the two end faces of optical fibers so that the light energy output by the transmitting fiber can be coupled to the receiving fiber to the maximum extent. Go in the optical fiber. It belongs to the field of optical passive components and is used in telecommunications networks, cable TV networks, user loop systems, and regional networks. It has the characteristics of small loss, low cost, and optional light splitting ratio. Used in polarization multiplexing/demultiplexers, high power, EDFA, optical fiber sensing, optical transmission and other fields.

2. How does polarizing beam splitter PBS work?

1. Working principle: Light has multiple polarization states, such as horizontal or vertical.?PBS usually transmits one state and reflects its orthogonal counterpart.

2. Birefringence: Some PBS designs use birefringent materials. Depending on the polarization of light,?Birefringent materials have different refractive indices. This causes different polarizations to propagate differently within the material.

3. The polarizing beam splitter is the core part of the polarizing beam splitter. It can split the incident light into two parts, one part is transmitted and the other part is reflected.

3. Types of polarizing beamsplitters

1. Cube PBS: A variant of the cube beamsplitter, made of two birefringent prisms glued together. It reflects one polarization and transmits the opposite polarization Vibrate.

2. Flat PBS: A plate designed to reflect one polarization and transmit another.

3. Thin film PBS: Use multiple thin film layers to achieve the desired polarization separation.

4. McNeil PBS: Uses a dielectric multilayer film optimized for a specific angle (usually 45°) to achieve effective polarization separation.

5. Wire grid polarizer: Designed as PBS, it reflects light waves perpendicular to the line oscillation (transverse electric or TE mode) instead of absorbing it.

4. Characteristics of polarizing beam splitters

1. Extinction ratio: represents the ratio of the desired polarization intensity to the undesired polarization intensity. The higher the ratio, the higher the polarization separation efficiency.

2. Wavelength sensitivity: Some PBSs perform best at specific wavelengths. Beyond this range, performance may degrade.

3. Insertion loss: Like other optical components, PBS can also cause system loss.

4. Damage threshold: In high-power laser applications, PBS must be able to withstand high energy levels.

5. Hirundo can provide polarization-maintaining fiber polarization combiners beam /splitters

Hirundo can provide fiber polarization combiners/splitters in 1310, 1480 or 1550nm as well as 1064nm and 2000nm bands, as well as polarization-maintaining fiber polarization combiners (PBC) or polarization beam splitters (PBS). A variety of customized solutions are available. The dual-fiber end (Port1 and Port2) is polarization-maintaining fiber; the single-fiber end (Port 3) is ordinary single-mode fiber or polarization-maintaining fiber.