Bandpass Filter (GK-BP Series)

The GKER Photonics Bandpass Filter (GK-BP Series) is a high-performance micro-optics device designed for precision wavelength selection in optical systems. It is engineered using advanced thin-film filter technology, which allows it to selectively transmit a specific range of wavelengths while effectively blocking unwanted signals. This feature is particularly beneficial in Erbium-Doped Fiber Amplifiers (EDFAs) and fiber laser systems where it helps to reduce noise and improve overall system performance.

Key specifications of the GK-BP Series Bandpass Filter include:

Wavelength Range: 1528 - 1565 nm, which is optimized for common telecommunications wavelengths used in EDFAs and fiber lasers.

Max. Insertion Loss: Typically around 0.7 dB, ensuring minimal signal loss as it passes through the filter.

Min. Isolation: At least 12 dB at wavelengths outside the passband (below 1521 nm and above 1574 nm), which helps to suppress unwanted signals.

Min. Return Loss: At least 50 dB, reducing back reflections and potential interference within the optical system.

Max. Polarization Dependent Loss: No more than 0.1 dB, maintaining consistent performance regardless of the input light's polarization state.

Thermal Stability: With a thermal wavelength drift of ≤ 0.005 dB/℃ and ≤ 0.003 nm/℃, ensuring stable performance over a range of temperatures.

Max. Optical Power (Continuous Wave): Capable of handling up to 300 mW, making it suitable for high-power applications.

Operating Temperature: Designed to function effectively within a range of -5 to + 70℃, ensuring reliable operation in various environmental conditions.

Fiber Type: Compatible with SMF-28 Fiber, a standard single-mode fiber used in many optical systems.

The unique processing and high-quality anti-reflective (AR) coating on the filter's surface enable it to handle high laser power while maintaining excellent environmental stability and reliability. These features make the GK-BP Series Bandpass Filter an indispensable component in high-power fiber laser systems and EDFAs, where precision, reliability, and efficiency are critical for optimal performance.