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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.

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Notícias da Empresa-How to calculate the insertion loss of a fiber optic splitter?

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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.

divisor do plc da fibra ótica

Divisor do PLC da gaveta

divisor do plc da montagem em rack

Cabos ópticos ativos AOC

AAWG

Fibra óptica Array

CWDM Mux Demux

demux do mux do dwdm

Calibre de diâmetro de fios Mux

ccwdm

Filtro do WDM

Microplaqueta do divisor do PLC

Microplaqueta Calibre de diâmetro de fios

Cabo de fibra óptica Patch

Fibra Óptica Pigtail

módulo ótico do transceptor

divisor do plc da fibra ótica

Divisor do PLC da gaveta

divisor do plc da montagem em rack

Cabos ópticos ativos AOC

AAWG

Fibra óptica Array

CWDM Mux Demux

demux do mux do dwdm

Calibre de diâmetro de fios Mux

ccwdm

Filtro do WDM

Microplaqueta do divisor do PLC

Microplaqueta Calibre de diâmetro de fios

Cabo de fibra óptica Patch

Fibra Óptica Pigtail

módulo ótico do transceptor

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

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

Notícias da Empresa-How to calculate the insertion loss of a fiber optic splitter?

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