1550nm Polarization Maintaining Filter Couplers

1550nm polarization-maintaining filter coupler is an optical device, which is used to keep the polarization direction of the optical signal stable and perform the functions of optical filtering and optical coupling at the same time. It mainly consists of two functional components: polarization maintaining filter and optical coupler.

Polarization-maintaining filter is an optical device that can separate or filter the vertically or horizontally polarized light in the incoming optical signal, and only retain the required polarized light signal. Polarization-maintaining filters are usually made of birefringent crystals with high refractive index difference. By adjusting parameters such as the thickness and angle of the crystals, selective filtering of optical signals with specific wavelengths and polarization directions can be achieved.

By combining polarization maintaining filter and optical coupler, 1550nm polarization maintaining filter coupler can realize polarization maintaining filtering and optical coupling of optical signals, and has excellent polarization maintaining performance, filtering effect, coupling efficiency and stability. It has a wide range of applications in optical communication, optical sensing, quantum communication and other fields.

1. High isolation: The isolation of the polarization maintaining filter can reach more than 40dB, effectively suppressing the interference of reflected light and stray light.

2. High stability: Polarization maintaining filter has excellent temperature characteristics, the working temperature range is -40℃~+85℃, and the temperature drift is less than 0.005nm/℃.

3. High reliability: Polarization maintaining filter coupler adopts full welding technology, no moving parts, no adjustment, shock and shock resistance, long life.

4. High integration: Polarization-maintaining filter coupler is small in size, light in weight, takes up less space, and is easy to integrate and install.

5. High flexibility: Polarization-maintaining filter couplers can be customized with different wavelengths, polarizations, ports, packaging and other parameters according to customer needs.

1. Optical communication: 1550nm polarization-maintaining filter couplers can be used in optical communication systems to keep the polarization direction of optical signals stable, filter and couple, and improve the transmission quality and performance of optical signals. It can be widely used in fiber optic communication, fiber optic sensing, fiber optic temperature measurement, fiber optic gyroscope and other fields.

2. Optical sensing: 1550nm polarization-maintaining filter couplers can be used in optical sensing systems to keep the polarization direction of optical signals stable, filter and couple, and improve the sensitivity and stability of optical sensors. It can be widely used in temperature sensing, pressure sensing, stress sensing, chemical sensing and other fields.

3. Quantum communication: 1550nm polarization-maintaining filter couplers can be used in quantum communication systems to keep the polarization direction of optical signals stable, filter and couple, and improve the confidentiality and security of quantum communication. It can be widely used in quantum key distribution, quantum teleportation, quantum key authentication and other fields.

4. Biomedicine: 1550nm polarization-maintaining filter coupler can be used in biomedical systems to keep the polarization direction of optical signals stable, filter and couple, and improve the sensitivity and accuracy of biomedical detection. It can be widely used in bioluminescence detection, bio-optical imaging, bio-spectroscopy and other fields.

1. Preparatory work: Before using the 1550nm polarization-maintaining filter coupler, preparatory work is required, including checking whether the equipment is in good condition, cleaning the optical interface, checking the power and wavelength of the light source, etc.

2. Connect the light source: connect the light source to the input port of the 1550nm polarization-maintaining filter coupler, and ensure that the output power and wavelength of the light source meet the requirements of the 1550nm polarization-maintaining filter coupler.

3. Connect the optical fiber: Connect the optical fiber to the output port of the 1550nm polarization-maintaining filter coupler to ensure the connection quality and stability of the optical fiber, and avoid the loss or attenuation of the optical signal caused by loose fiber plug or poor connection.

4. Adjust the optical path: According to actual needs, adjust the optical path of the 1550nm polarization-maintaining filter coupler, including adjusting the angle of the optical path, rotating the polarizer, adjusting the length of the optical path, etc., to ensure the stability of the optical path and the normal transmission of optical signals.

5. Test optical signal: Use optical power meter or spectrometer and other testing equipment to test the optical signal of 1550nm polarization maintaining filter coupler, including testing optical power, wavelength, polarization direction, transmittance and other parameters, to ensure that the light Signal stability and quality.

1. Cleaning and maintenance: The optical interface of the 1550nm polarization-maintaining filter coupler needs to be cleaned regularly to avoid dust and dirt affecting the transmission and loss of optical signals. At the same time, it is necessary to avoid strong light exposure and high temperature environment to avoid aging and damage of optical materials.

2. Avoid strong vibration and mechanical collision: 1550nm polarization-maintaining filter coupler is a high-precision optical device, which needs to avoid strong vibration and mechanical collision to avoid affecting the stability and precision of the optical path.

3. Pay attention to the power and wavelength of the light source: the power and wavelength of the light source of the 1550nm polarization-maintaining filter coupler must meet the product requirements to avoid damage to optical devices or degradation of optical signal quality due to excessive light source power or excessive wavelength deviation.

4. Adjust the angle and length of the optical path: When using the 1550nm polarization-maintaining filter coupler, you need to pay attention to adjusting the angle and length of the optical path to ensure the stability and accuracy of the optical path and avoid problems such as optical signal attenuation and polarization direction changes.

5. Avoid strong electromagnetic interference: 1550nm polarization-maintaining filter coupler is a high-precision optical device, which needs to avoid strong electromagnetic interference and avoid affecting the stability and accuracy of the optical path.