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Frequently Asked Questions

The product is a Polarization Maintaining (PM) 3-Port Optical Circulator. It operates at 1310, 1480, 1550, or 1590 nm and comes in single-stage and dual-stage variants.

The operating wavelength for the circulator can be 1310 nm, 1480 nm, 1550 nm, or 1590 nm. These wavelengths fall within the typical bands used for optical communication systems.

The bandwidth of the circulator is ±20 nm for both the single-stage and dual-stage versions. This is the range around the central wavelength in which the circulator can operate effectively.

The transmitting direction for the 3-port circulator is from port 1 to port 2, and from port 2 to port 3. This means that light entering port 1 will exit from port 2, and light entering port 2 will exit from port 3.

For the single stage circulator, the typical Isolation at 23℃ (room temperature) is 40 dB, and the minimum is 30 dB. For the dual stage circulator, the typical Isolation is 55 dB, and the minimum is 40 dB. Isolation is the measure of how well the circulator prevents light from traveling in the opposite direction, so higher values mean better performance.

For the single stage circulator, the typical Insertion Loss at 23℃ is 0.6 dB, and the maximum is 0.8 dB. For the dual stage circulator, the typical Insertion Loss is 0.8 dB, and the maximum is 1.0 dB. Insertion Loss is the measure of the power loss that happens when light is transmitted through the circulator, so lower values indicate more efficient transmission.

For the single stage circulator, the minimum Extinction Ratio is 20 dB for the slow axis only. For the dual stage circulator, the minimum Extinction Ratio is 18 dB for both axes and 22 dB for the slow axis only. The Extinction Ratio is a measure of the ability to maintain the polarization state of the transmitted light, with higher values indicating better performance.

The minimum Return Loss for both the single-stage and dual-stage circulators is 50 dB. The Return Loss is the measure of the power reflected back to the source, with higher values indicating less reflection and better performance.

The minimum Directivity for both the single-stage and dual-stage circulators is 50 dB. Directivity is a measure of how well the circulator guides light from one port to the next without any leakage to the other ports. A higher value indicates better performance.

The maximum Optical Power Handling is 300 mW. This is the maximum level of light power that the circulator can handle without being damaged.

The Operating Temperature range is from -5 to 70 degrees Celsius, and the Storage Temperature range is from -40 to 85 degrees Celsius. These ranges indicate the temperatures within which the circulator can operate safely and be stored without damage.

The Package Dimensions are Φ5.5 x L38 mm or box type.

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