Quantum Size Effect of Inner Cladding Fibres with InP Nano Thin Films

Optical amplified characteristics of inner cladding fibres with InP thin films are tested. The results indicate that this kind of fibres exhibit better optical amplification, which is advantageous for short lengths of fibres. The amplification coefficients of per unit length are 1.40-5.12 dB/m at the wave band from 906 to 1044 nm, 1.40- 15.35dB/m from 1080 to 1491nm, and 1.86-7.44dB/m from 1524 to 1596nm. Based on the hydrogen atomic model, we calculate the comparative size of the InP particle aB = 8.313 nm. The result displays the quantum size effect. By calculating the change of the energy band of particles with different sizes, the experimental data are explained by quantum size effect.     

Amplification Characteristics of Optical Fibres Doped with Nano Materials of InP

We take an enhanced structure of existing optical fibres to investigate the amplification characteristics. Nano and optical fibre technologies both are employed in our structure, i.e. the so-called nano-film amplification fibre where nano-film is inserted between the core and the inner cladding of the optical fibre. In the developed model, InP is chosen as a doped semiconductor to examine its amplification performance and 69.7nm is chosen as the thickness of the film. From our experimental results, the optical fibre structure shows its significant amplification characteristics for wavelength between 1080nm and 1491 nm. Amplification characteristics are also found in wavelengths 906-1044 nm and 1524-1596nm.     

掺杂纳米材料光纤的研制

将纳米技术与光纤技术相结合,利用改进的化学气相沉积法(MCVD)制作纳米级InP薄膜内包层光纤及在普通单模光纤纤芯中掺杂纳米级InP粒子的新型光纤,前者单位长度放大系数最大达到15.35dB/m,能在较短的长度上对信号光起到放大作用,便于集成化;后者经实验证实其纤芯具有光波导传输性能.两种新型高非线性光纤在光通信器件中的具有应用前景.