光电技术应用
光電技術應用
광전기술응용
ELECTRO-OPTIC WARFARE & RADAR PASSIVE COUNTERMEASURES
2011年
4期
28-31,48
,共5页
陈凯%曹涧秋%陆启生
陳凱%曹澗鞦%陸啟生
진개%조간추%륙계생
相干光学%高斯谢尔模光束%ABCD光学系统%交叉谱密度矩阵%光谱偏振度
相榦光學%高斯謝爾模光束%ABCD光學繫統%交扠譜密度矩陣%光譜偏振度
상간광학%고사사이모광속%ABCD광학계통%교차보밀도구진%광보편진도
coherence optics%Gaussian Schell-model beams%ABCD optical system%cross-spectral density matrix%spectral degree of polarization
推导了高斯谢尔模光束通过ABCD光学系统的交叉谱密度矩阵,研究了该条件下光谱偏振度的变化情况。比较研究了高斯谢尔模光束通过自由空间和聚焦光学系统的情况。研究表明,在自由空间中传输足够远的距离后光谱偏振度将达到稳定,在聚焦光学系统中光谱偏振度在焦面位置附近有明显的起伏变化,两者都与光源参量的选择有关。特别指出,位于焦面上的光谱偏振度等于其远场的光谱偏振度稳定值。
推導瞭高斯謝爾模光束通過ABCD光學繫統的交扠譜密度矩陣,研究瞭該條件下光譜偏振度的變化情況。比較研究瞭高斯謝爾模光束通過自由空間和聚焦光學繫統的情況。研究錶明,在自由空間中傳輸足夠遠的距離後光譜偏振度將達到穩定,在聚焦光學繫統中光譜偏振度在焦麵位置附近有明顯的起伏變化,兩者都與光源參量的選擇有關。特彆指齣,位于焦麵上的光譜偏振度等于其遠場的光譜偏振度穩定值。
추도료고사사이모광속통과ABCD광학계통적교차보밀도구진,연구료해조건하광보편진도적변화정황。비교연구료고사사이모광속통과자유공간화취초광학계통적정황。연구표명,재자유공간중전수족구원적거리후광보편진도장체도은정,재취초광학계통중광보편진도재초면위치부근유명현적기복변화,량자도여광원삼량적선택유관。특별지출,위우초면상적광보편진도등우기원장적광보편진도은정치。
The cross-spectral density matrix of Gaussian Schell-model beams through the ABCD optical system is derived, and the variation of the spectral degree of polarization under this condition is given. A comparison between the cases of Gaussian Schell-model beams through the free space and focal optical system is studied. The study shows that the spectral degree of polarization will tend to the stable value after a long-propagation distance in free space, and the spectral degree of polarization has a sharp fluctuation at the position of local plane in focal optical system. Both are related to the selection of light source parameters. In particular, the spectral degree of polarization at the position of focal plane equals the stable value of the spectral degree of polarization at the far field.