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How to calculate the insertion loss of a fiber optic splitter?

2025-07-31

The insertion loss of a fiber optic splitter is calculated by measuring the difference between the input and output optical powers. The specific method is as follows:

I. Calculation Formula

The basic formula for insertion loss (IL) is:

IL = -10log₁₀(P_out/P_in) (unit: dB)

Or simplified:

IL = P_in(dBm) - P_out(dBm) (directly subtract using logarithmic units).

II. Measurement Steps

Input Power Reference

Use an optical power meter to directly measure the input fiber power (P_in), ensuring that the light source is stable (e.g., 1550nm wavelength).

Output Power Measurement

Connect the splitter output ports to an optical power meter in sequence and record the power (P_out) at each port.

Loss Calculation

Calculate the insertion loss for each port using the formula, and take the maximum value as the nominal loss value for the splitter.

III. Typical Loss Reference Values

Relationship between Splitting Ratio and Loss

1:2 Splitter: Approximately 3.8 dB
1:4 Splitter: Approximately 7.4 dB
1:8 Splitter: 10.7-13 dB
1:16 Splitter: 12.04-13 dB

IV. Notes

Additional Loss: The difference between the input power and the sum of the total output power must be calculated separately (AL = 10log₁₀((sum P_out)/P_in)).

Uniformity: The difference in loss across all ports of a PLC splitter should be ≤ 0.8 dB.

The above method can accurately evaluate splitter performance. It is recommended to use an OTDR to detect reflective events to eliminate installation errors.

Szczegóły wiadomości

Do domu > Aktualności >

Aktualności Firmowe O-How to calculate the insertion loss of a fiber optic splitter?

Wydarzenia

Aktualności

Sprawy

How to calculate the insertion loss of a fiber optic splitter?

2025-07-31

The insertion loss of a fiber optic splitter is calculated by measuring the difference between the input and output optical powers. The specific method is as follows:

I. Calculation Formula

The basic formula for insertion loss (IL) is:

IL = -10log₁₀(P_out/P_in) (unit: dB)

Or simplified:

IL = P_in(dBm) - P_out(dBm) (directly subtract using logarithmic units).

II. Measurement Steps

Input Power Reference

Use an optical power meter to directly measure the input fiber power (P_in), ensuring that the light source is stable (e.g., 1550nm wavelength).

Output Power Measurement

Connect the splitter output ports to an optical power meter in sequence and record the power (P_out) at each port.

Loss Calculation

Calculate the insertion loss for each port using the formula, and take the maximum value as the nominal loss value for the splitter.

III. Typical Loss Reference Values

Relationship between Splitting Ratio and Loss

1:2 Splitter: Approximately 3.8 dB
1:4 Splitter: Approximately 7.4 dB
1:8 Splitter: 10.7-13 dB
1:16 Splitter: 12.04-13 dB

IV. Notes

Additional Loss: The difference between the input power and the sum of the total output power must be calculated separately (AL = 10log₁₀((sum P_out)/P_in)).

Uniformity: The difference in loss across all ports of a PLC splitter should be ≤ 0.8 dB.

The above method can accurately evaluate splitter performance. It is recommended to use an OTDR to detect reflective events to eliminate installation errors.

Rozdzielacz światłowodowy PLC

Rozdzielacz kasetowy Plc

Rozdzielacz PLC do montażu w szafie

Kable aktywne optyczne AOC

AAWG

Macierz światłowodowa

CWDM Mux Demux

DWDM Mux Demux

AWG Mux

CCWDM

Filtr WDM

Chip rozdzielacza PLC

Układ AWG

Patchcord światłowodowy

Pigtail światłowodowy

Optyczny moduł nadawczo-odbiorczy

Rozdzielacz światłowodowy PLC

Rozdzielacz kasetowy Plc

Rozdzielacz PLC do montażu w szafie

Kable aktywne optyczne AOC

AAWG

Macierz światłowodowa

CWDM Mux Demux

DWDM Mux Demux

AWG Mux

CCWDM

Filtr WDM

Chip rozdzielacza PLC

Układ AWG

Patchcord światłowodowy

Pigtail światłowodowy

Optyczny moduł nadawczo-odbiorczy

Szczegóły wiadomości

Aktualności Firmowe O How to calculate the insertion loss of a fiber optic splitter?

Aktualności

Sprawy

How to calculate the insertion loss of a fiber optic splitter?

Aktualności Firmowe O-How to calculate the insertion loss of a fiber optic splitter?

Aktualności

Sprawy

How to calculate the insertion loss of a fiber optic splitter?