Measurement method by OTDR
Measurement method by OTDR
In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an otdr manufacturer provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.
An object of the present fusion splicer is to provide techniques for performing OTDR measurement of a long span transmission line in an optical transmission system.
According to the present invention, the main signal light can be used as pump light of OTDR signal light. Therefore, the OTDR signal light is Raman amplified so that the dynamic range is increased and a long span optical transmission line can be surveyed without newly providing any pump light source for the OTDR signal light.
In the method, the fusion splicer manufacturer signal light may be Raman amplified by using the main signal light that is transmitted from the first terminal station, or by using the main signal light transmitted from the second terminal station. In addition, the OTDR signal light can be Raman amplified by using bidirectional main signal light as bidirectional pump light. Accordingly, the effect of Raman amplification can be enhanced.
In addition, in the method of the present invention, the main signal light used as the pump light for the OTDR signal light may be Raman amplified by using pump light, transmitted from the first terminal station, that is usually used for Raman amplifying main signal light transmitted from the second terminal station to the first terminal station.
In the method, a wavelength band of the main signal light of the optical transmission system may be 1550 nm band, and a wavelength band of the OTDR signal light may be 1650 nm band. By using these wavelength bands, effective Raman amplification can be realized. In addition, by using the 1650 nm band otdr manufacturer signal light, measurement of optical transmission line beyond EDF can be realized even in an optical transmission system including EDF.
In a method for performing OTDR measurement in an optical transmission system including a first terminal station and a second terminal station, OTDR signal light is transmitted from an otdr manufacturer provided in the first terminal station to the second terminal station, in which the OTDR signal light is Raman amplified by using main signal light of the optical transmission system as pump light.
An object of the present fusion splicer is to provide techniques for performing OTDR measurement of a long span transmission line in an optical transmission system.
According to the present invention, the main signal light can be used as pump light of OTDR signal light. Therefore, the OTDR signal light is Raman amplified so that the dynamic range is increased and a long span optical transmission line can be surveyed without newly providing any pump light source for the OTDR signal light.
In the method, the fusion splicer manufacturer signal light may be Raman amplified by using the main signal light that is transmitted from the first terminal station, or by using the main signal light transmitted from the second terminal station. In addition, the OTDR signal light can be Raman amplified by using bidirectional main signal light as bidirectional pump light. Accordingly, the effect of Raman amplification can be enhanced.
In addition, in the method of the present invention, the main signal light used as the pump light for the OTDR signal light may be Raman amplified by using pump light, transmitted from the first terminal station, that is usually used for Raman amplifying main signal light transmitted from the second terminal station to the first terminal station.
In the method, a wavelength band of the main signal light of the optical transmission system may be 1550 nm band, and a wavelength band of the OTDR signal light may be 1650 nm band. By using these wavelength bands, effective Raman amplification can be realized. In addition, by using the 1650 nm band otdr manufacturer signal light, measurement of optical transmission line beyond EDF can be realized even in an optical transmission system including EDF.