Alignment Sensitivity yog dab tsi?
Alignment Sensitivity yog ib qho kev ntsuas tseem ceeb uas piav qhia txog qib uas lub laser, optical resonator, los yog lwm yam optical system teb rau misalignment. Thaum ib qho khoom siv nyob rau hauv lub resonator-xws li ib qho kev sib txuas lus tso zis- dhau ntawm qhov sib txawv ntawm qhov sib txawv, txoj hauj lwm thiab kev nthuav tawm ntawm cov kab hluav taws xob intracavity hloov raws li.
Qhov chaw ntawm misalignment muaj ntau haiv neeg: phau ntawv kev sib cuag nrog cov khoom siv kho qhov muag, kev ntxhov siab ntawm lub laser vaj tse, thermal expansion induced los ntawm kev hloov nyob rau hauv ambient kub, thiab txawm thermal cuam tshuam los ntawm lub laser nws tus kheej ua hauj lwm (xws li cov asymmetric Cheebtsam ntawm lub thermal lensing nyhuv)-tag nrho cov uas yuav ua rau sib npaug misalignment.
Lub Cev Mechanism ntawm Misalignment: Yuav Ua Li Cas Lub Beam "mus Astray"?
Hauv ob - daim iav kho qhov muag resonator, qhov kho qhov muag axis txhais tau tias yog txoj kab txuas cov chaw ntawm curvature ($C_1$ thiab $C_2$) ntawm ob daim iav kawg. Thaum twg daim iav dhau los ntawm qhov chaw deflection, nws qhov chaw sib thooj ntawm curvature hloov, thiab qhov kho qhov muag axis hloov raws li.
Rau cov resonators uas muaj qhov aperture - suav nrog cov aperture zoo ntawm cov kab noj hniav tsom iav lawv tus kheej - daim iav qaij ua rau lub qhov muag axis hloov mus rau qhov aperture; Qhov no yog sib npaug rau qhov aperture ua decentered nrog rau kev hwm rau lub resonator axis. Lub decentered aperture ua rau lub resonator's eigenmodes hloov mus rau hauv ib qho superposition ntawm symmetric thiab antisymmetric hom, yog li degrading lub intrinsic zoo ntawm cov zis beam.
Misalignment kuj muaj ib tug dynamic dimension: mechanical vibrations ntawm kab noj hniav daim iav txhais mus rau taw tes jitter nyob rau hauv cov zis beam, nrog rau qhov loj ntawm cov nyhuv no txiav txim los ntawm tus resonator tus tsim. Yog li ntawd, optimizing tus tsim kom txo tau rhiab heev rau kev sib raug zoo yuam kev ua hauj lwm raws li ib tug zoo lub tswv yim rau kev txhim kho beam taw tes stability.
Hom Resonator thiab Inherent Stability Differences
Resonators ntawm txawv configurations qhia qhov txawv loj nyob rau hauv lawv "tolerance" rau misalignment. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau kev tsim cov tshuab laser muaj zog.
