780-1550nm PM滤波器耦合器（1x2/2x2） | 瑆创光学电子商店

780-1550nm PM Filter Coupler (1x2/2x2) is a versatile optical component known for its exceptional performance. It offers low insertion loss, high return loss, and a high extinction ratio, making it a valuable asset in optical systems. This coupler operates effectively in the 780-1550nm wavelength range and can function as both a 1x2 splitter and a 2x2 coupler. It finds applications in critical areas such as EDFA & Raman amplifiers, fiber sensors, and fiber optical instruments. Whether splitting or combining optical signals, this coupler excels in maintaining signal quality and managing optical power efficiently.
Features Low Insertion Loss   High Return Loss   High Extinction Ratio	Applications EDFA & Raman Amplifier  Fiber Sensor Fiber Optical Instrument

Specifications

With connectors, IL is 0.3dB higher, RL is 5dB lower, and ER is 2dB lower.  

Connector key is aligned to slow axis.

Package Dimensions

Both axis working	Slow axis working, Fast axis blocked

Ordering Information

STPMFC-①①①①-②③③④-⑤⑤⑤-⑥⑥⑥-⑦⑧-⑨-⑩⑩⑩ (1x2 Type)  

STPMFC-①①①①-②③③④-⑤⑤⑤-⑥⑥⑥-⑦⑧-⑨-⑩⑩⑩⑩ (2x2 Type)

Q:What does Filter Coupler mean?

A:Filter Coupler, often used in fiber optic communication systems, is a device that combines or splits signals based on their wavelengths. It's a type of wavelength-selective coupler that uses filtering elements to determine which signals are combined or separated. Here's a breakdown of its key aspects:

1. Functionality: A Filter Coupler can split an incoming optical signal into two signals with different wavelength ranges or combine two signals with different wavelengths into a single output. This functionality is essential for Wavelength Division Multiplexing (WDM) systems, where multiple signals with different wavelengths are transmitted together but need to be separated or combined at certain points in the network.

2. Filtering Technique: The device typically employs a filtering element, such as a thin-film filter, diffraction grating, or fiber Bragg grating, to selectively allow certain wavelengths to pass while reflecting others. This selective transmission and reflection enable the coupling or decoupling of specific wavelength channels.

3. Applications:Wavelength Division Multiplexing (WDM): In WDM systems, filter couplers are used to add or drop specific wavelength channels, allowing for efficient bandwidth management and channel routing in optical networks.

Signal Routing: Filter couplers can route different wavelength signals to different parts of a system, useful in complex networks or systems requiring precise signal management.

Signal Monitoring: They can also be used to extract a small portion of the signal at a specific wavelength for monitoring or testing without disturbing the rest of the signal.

4. Advantages:Compact Size: Filter couplers can be made compact and integrated into various systems.

High Precision: They offer precise control over which wavelengths are coupled or decoupled, essential for high-performance optical systems.

Low Loss: Modern filter couplers are designed to have low insertion loss, ensuring minimal signal power is lost in the coupling process.

Q:What is Filter Coupler's type 1x2,2x2mean?

A:The terms 1x2 and 2x2 in the context of Filter Couplers (or any fiber optic couplers) refer to the configuration of the input and output ports:

1. 1x2 Coupler:

   - "1x" part indicates that there is one input port.

   - "x2" part indicates that there are two output ports.

   - Essentially, a 1x2 coupler splits the incoming light from a single input fiber into two separate output fibers. It can also be used in reverse to combine light from two fibers into one.

2. 2x2 Coupler:

   - "2x" part indicates that there are two input ports.

   - "x2" part also indicates that there are two output ports.

   - A 2x2 coupler can either split light from two inputs to two outputs or combine light from two inputs into two outputs, depending on its design and the specific application.

The numerals before and after the 'x' essentially denote the number of input and output ports, respectively. These configurations are important for understanding the functionality of the coupler in a fiber optic network and determining how they can be integrated into various systems for splitting, combining, or routing optical signals.

Q:What is Both axis working and Fast axis blocked?

A:"Both axis working" and "Fast axis blocked" are terms related to the handling of polarization in fiber optics, particularly in the context of Polarization-Maintaining (PM) fibers and components.

1. Both Axis Working:

    - This term means that the optical component or system is designed to work with light that is polarized along both the slow and the fast axis of the PM fiber or component.

    - In such a configuration, the light maintaining polarization along both axes is utilized. This can be important in applications where the preservation and utilization of the full polarization state of the light are crucial.

2. Fast Axis Blocked:

    - This term indicates that the component is designed to block or attenuate the light that is polarized along the fast axis of the PM fiber, while allowing light that is polarized along the slow axis to pass through.

    - By blocking the fast axis, the component ensures that the light is maintained in a single polarization state (aligned with the slow axis), which is essential in systems where maintaining a specific polarization state is necessary for proper functionality or to avoid polarization-related issues.

Q:What does Uniformity mean?

A:Uniformity in the context of fiber optics, especially when referring to components like couplers or splitters, denotes the consistency or evenness in the distribution of optical power among the output ports. Here's what uniformity implies in different scenarios:

1. Uniformity in Fiber Couplers/Splitters: It refers to how evenly the optical signal is split across the output ports. In an ideal uniform coupler or splitter, each output port receives an equal fraction of the input power. For instance, in a 1x4 uniform splitter, the input signal is divided equally into four parts, with each output receiving 25% of the input power.

2. Importance in System Performance: High uniformity is crucial for ensuring that all paths or channels in a fiber optic system receive adequate and equal power. This is particularly important in systems like sensor arrays, signal distribution networks, or in Wavelength Division Multiplexing (WDM) where uneven power distribution can lead to signal degradation, data loss, or inefficiencies in system performance.

3. Uniformity in Wavelength Response: Apart from power distribution, uniformity can also refer to the consistency of a component's performance across a range of wavelengths. In devices like filters or WDM components, uniformity means that the device performs similarly across the specified wavelength range, without significant fluctuations in loss, dispersion, or other parameters.

In summary, uniformity is a measure of consistency and evenness in the distribution of optical power or performance across outputs or wavelengths, and it's a crucial parameter in the design and evaluation of fiber optic systems and components for ensuring optimal performance.

Q:What is Coupling Ratio？

A:Coupling Ratio in fiber optics, particularly when discussing couplers or splitters, refers to the distribution of optical power between the output ports of the device. It indicates how the input signal power is divided and allocated to the outputs. Here are some key points about Coupling Ratio:

1. Definition: The coupling ratio is usually expressed as a percentage or a ratio. For instance, in a 1x2 coupler, if the input signal is split so that 70% of the power goes to one output and 30% to the other, the coupling ratio can be expressed as 70/30.

2. Applications:

    - Signal Distribution: In applications where the signal needs to be distributed unevenly to different parts of the system, a coupler with the appropriate coupling ratio is used.

    - Balancing Systems: In some systems, it's essential to balance the power in different paths, and couplers with specific coupling ratios are employed to ensure the desired distribution of power.

3. Variability and Customization: The coupling ratio can be tailored during the manufacturing of the coupler to meet specific application requirements. It's not limited to even splits like 50/50 but can be designed for any ratio like 90/10, 80/20, etc.

4. Measurement and Specification: The coupling ratio is an important specification and is often measured to ensure that the coupler meets the required system performance. It's particularly crucial in systems where the precise power distribution is necessary for the proper functioning of the system.

Understanding and selecting the appropriate coupling ratio is essential for the design and operation of fiber optic systems, as it directly impacts signal distribution, system balance, and overall performance.

Q:What is Filter Coupler's Optical Power？

A:1. Input Optical Power: Filter couplers, like other optical components, receive an input optical power. This is the power of the incoming optical signal that is fed into the coupler for further processing or distribution. The input power is a crucial parameter as it determines the strength of the signal being processed by the coupler.

2. Output Optical Power: Filter couplers split or combine optical signals, resulting in one or more output optical signals. The output optical power refers to the power level of these signals after they have been processed by the coupler. The distribution of power among the output ports depends on the coupler's design and coupling ratio.

3. Power Loss: Filter couplers can introduce some level of optical loss. This means that the output optical power may be lower than the input optical power due to inherent losses in the coupling process. The amount of power loss is typically specified in the coupler's datasheet.

4. Uniformity: In some filter couplers, maintaining uniformity in the distribution of optical power among the output ports is essential. Uniformity ensures that each output port receives an equal share of the input power, and deviations from uniformity can impact system performance.

5. Power Handling Capability: Filter couplers are designed to handle a specific range of optical power levels. Exceeding the specified power handling capacity can lead to signal distortion, component damage, or safety hazards.

In summary, while "Filter Coupler's Optical Power" isn't a specific term, optical power plays a critical role in the operation and performance of filter couplers by determining the strength of the input and output signals, as well as the losses and uniformity in power distribution.

Q:What is Directivity？

A:Directivity is a parameter used in the context of optical and RF (radio frequency) devices, antennas, and components. It measures the ability of a device or system to direct or focus the transmitted or received signals into a specific direction while minimizing the leakage or reception of signals from unwanted directions. Directivity is particularly important in systems where signal isolation and precision are crucial. Here's a more detailed explanation:

1. Definition: Directivity is a measure of the ability of a device or system to efficiently transmit or receive signals in a specific direction, typically expressed in decibels (dB). It quantifies the level of signal concentration or focusing achieved by the device.

2.Importance:

   - Signal Concentration: In devices like antennas, optical couplers, and directional couplers, high directivity means that a significant portion of the transmitted or received signal is concentrated in the desired direction, leading to effective signal transmission or reception.

   - Signal Isolation: Directivity also relates to the ability to minimize signal leakage or interference from unwanted directions. A device with high directivity can reject signals coming from directions other than the desired one, enhancing signal isolation.

3. Measurement:

   - In practice, directivity is often measured using specialized equipment and techniques. For antennas, it may involve measuring radiation patterns in an anechoic chamber.

   - In optical components, it can be measured by assessing how efficiently the device couples or directs light in a specific direction, and how well it rejects light from other angles.

4. Applications:

   - Antennas: Directivity is essential in antennas used in wireless communication systems, radar systems, and satellite communication. High directivity allows antennas to focus their radiation pattern towards specific targets or receivers.

   - Fiber Optics: In optical components like optical couplers and isolators, directivity measures how effectively light is coupled or directed in the desired direction while minimizing back reflection and unwanted scattering.

5. Directivity vs. Gain: While both directivity and gain are related to the concentration of signals, they are not the same. Gain measures the increase in signal strength compared to an isotropic radiator or antenna, whereas directivity specifically quantifies the focusing or directionality of the device. 

In summary, directivity is a critical parameter for devices and systems that involve signal transmission, reception, and isolation, and it indicates how effectively these devices can concentrate signals in a desired direction while minimizing interference from other directions.

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