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live chat info@hirundo-link.com 0757-26619220


3/4Port fiber circulator

Fiber Length
Fiber Jacket
Central Wavelength
Fiber Type
Please send email to info@hirundo-link.com if any questions, we will reply you within 12 hours, thank you!

Hirundo's optical fiber torus is a multi-port non-reciprocal optical device in which light can only travel in one direction.If the signal is input through port 1, it is output through port 2. If the signal is input from port 2, it will be output from port 3. The output loss is very small. When the optical input is from port 2, the optical output from port 1 will lose a lot. Similarly, when the optical input is from port 3, the optical output from port 1 and 2 will lose a lot.Fiber ring is widely used in fiber laser, diff multiplexer, bidirectional pumping system, dispersion compensation device, fiber sensing, scientific research and other fields. Hirundo's optical fiber torus is available at 1310 nm and 1550nm, and has undergone rigorous quality inspection.

Product Highlights

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Dispersion compensation


Signal multiplication


Low insertion losse


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Our production plant
3 Port4 Port
Operating wavelength(nm)1310±30 or 1550±301310±30 or 1550±30
Test wavelength(nm)1310/15501310/1550
Port ConfigurationPort 1 to Port2 to Port3Port 1 to Port2 to Port3 to Port4
Insertion Loss (dB)≤0.8≤0.8
Cross Talk(dB)≥50≥50
Channel Peak Isolation(dB)≥50≥50
Channel Minimum Isolation(dB)≥40≥40
Return Loss(dB)≥50≥50
Wavelength Temperature Shifting(nm/℃)≤0.002≤0.002
Polarization Dependent Loss @23℃(dB)≤0.15≤0.15
Polarization Mode Dispersion(ps)≤0.10≤0.10
Max Optical Power(mW)300300
Operating Temperature(℃)-40~+85-40~+85
Storage Temperature(℃)-40~+85-40~+85