This paper analyses and researches the solve method for optical link loss and optical divide ratio in star optical fiber networks,introduces the solve clue,method and steps by the examples for optical divide ratio of every optical distributor and for optical link loss of the entire network in complicated star optical fiber networks.

This paper analyses and studies the structure of star optical fiber transport network, reaches the algebraic relationship of optical link loss between single star optical fiber network and multiple star optical fiber network, and presents the calculation forma of optical divide ratio of optical distributors.

Fiberoptic gas sensor is a novel sensor,a performance of methane sensor is analyzed and tested from the aspect of the fiber[CD*2]optic link loss,driving technology light source and output waveform of the phaselocked amplification circuit,methane absorption and etc in this paper.

Based on the optical fiber loss,solving the modified nonlinear Schrodinger equations,the paper analyses the function affected by GVD and SPM in single mode optical fiber in negative GVD area.

This paper discusses the status of soliton communication systems,with emphasis on the physics of fiber soliton,the effect of the fiber loss on soliton,and how fiber solitons can be maintained and propagated over the thousands of kilometers by using optical amplifiers.

Research demonstrates that fiber loss is the main factor that influences quantum key transmission rate, while quantum BER is related to fiber loss, dispersion, pulse width, dark counts and Rayleigh backscattering.

The intensity of backscattered light is measured and used to determine the fiber loss.

This paper studies the relationship between maximum number of optical fiber lines and permissible optical link loss in single star optical fiber network.