dex of pure PMMA is 1.49, so the light in which the tran smissio n rate of about 2.01 108m / s.
Homoge neous or in homoge neous medium light tran smissi on medium to satisfy Fermat (Fermat) prin ciple, that light from the space point to ano ther along the time for extreme dista nee and spread, that is, the smallest of light along the optical path or the path of maximum or con sta nt com muni catio n.
3.POF prin ciple of light tran smissi on
Fluoresce nt POF POF core material is mixed with a certa in amount of fluoresce nt age nt prepared from the POF, POF after such a specific wavele ngth of light irradiatio n, will send a specific wavele ngth of light, the prin ciple is more complex, can be simply that the ground state molecule After bonding electro n absorptio n of light excitati on, and the n retur n to the sin glet ground state molecules that fluoresce. Refractive in dex distributio n by fluoresce nee of structure POF can be divided into fluoresce nt SI POF and fluoresce nee GI POF, doped orga nic dye POFA most importa nt feature is the wide range of wavele ngths to provide high power output.
Fluoresce nt POF schematic diagram of the tran smissi on of light below, it meets the gen eral fiber of the tran smissi on SI optical properties, but differe nt from the wavele ngth of in cide nt light wavele ngth of light emitted.
Fluoresce nt light POF there is ano ther way of tran smissi on, which is irradiated from the side of the in cide nt light can be fluoresce nt POF, the output beam emitted from the fiber surface at both en ds, of course, the wavele ngth of in cide nt light is differe nt from the tran smissi on wavele ngth of light emitted. Optical properties of fluoresce nt material mai nly depe nds on the matrix material, the same fluoresce nee characteristics of POF gain amplificati on pump wavele ngth, fluoresce nee POF len gth and the amount of dopa nt and concen trati on. Gain G is called POF output sig nal power Pout to the in put optical power ratio betwee n a Pin.
4. Con clusi on
POF can be passed just because of the fiber with the core structure of the skin, the light tran smissi on of POF is based on prin ciple of total reflect ion of light tran smissi on, light
tran smissi on in the SI POF in the zigzag way for the total reflect ion type of light i n the GI POF in the transmission mode is the sine curve type; the same time to simplify the calculation, the parameters used for calculation of Meridian, Meridian is the propagation path of light through the optical axis and is always in the same pla ne, the calculati on of these parameters in clude the maximum angle of incidence or emission angle, numerical aperture, In the step-type fiber radial geometry and reflect ion travel times; side light and
fluoresce nce POF POF is by total in ternal reflect ion of light tran smissi on prin ciple, for more tha n sin gle-core POF side light loss caused by the side of non-n atural light, and for multi-core side of the light bending loss POF is produced by the luminous side. After a specific wavele ngth of fluoresce nce excitati on POF issued after a specific wavele ngth of light, and not only excit ing light in cide nt from the end, but also from the side of the n cide nt.
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中英论文翻译对照_塑料光纤传光原理通信
