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我们镭雕加工的激光是如何產生?/h2>

来源Q?a href='http://wquant.com/news/99.html'>http://wquant.com/news/99.html发(cai)旉(duo)Q?016-10-10

1、量子理?br />

1917q(qian)(cun)因斯坦提出(hong)(yi)(qu)與(lu)d(hui)(cui)(cui)的(qiao)用有三個基本的過程Q即(chan)發(jian)Ӟ自發攑ְ(cui)(cui)(xia)激發(jian)(hao)(qiao)E。激發(jian)收(duo)一(lei)的攉E,當E(hao)光(zui)(zui)含有hμ=E2-E1之光(zui)(zui)子入(hao)處(yan)g能階(chou)((nuo)態)(liao)E1Q而其M(hui)高(zhan)(wen)(zhi)(yue)為E2物質時,的光(zui)(zui)子能(yue)(gan)(ye)使該原(zeng)自E(ji)1w(tao)遷至E2?

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當原(ying)(ying)(ying)(ying)(song)(shi)(shi)w遷(nie)x(lian)(jian)態後,(ren)(lian)(lian)(sui)個過E(fu)它(gang)q(ma)至基態Q(ben)其(juan)(jian)放(yi)(yi),(ren)即(chong)須外界的(qing)q(cha)Q(ben)過(juan)D|()後Q(ben)它(nie)行(nie)E2(cen)能(shi)(shi)階降(mi)(nie)E1(cen)能(shi)(shi)階,(ren)(juan)釋攑ևhμ(wei)(fei)(fan)(zui)(ying)(ying)(ying)(ying)(song)(shi)(shi)量(xi)(ren)此自(jian)放(yi)(yi)的(qing)(kou)(gui)(mo)相(huan)(huan)(qu)是Q意的(qing)(mo)另(huo)(juan)過程為激(lian)(jian)放(yi)(yi)(fan)處於(zha)Ȁ(jian)態(cen)原(ying)(ying)(ying)(ying),(ren)由於(zha)受到外來(wei)(sui)(dao)(cen)撞擊,(ren)(yao)(yao)由(ai)高能(shi)(shi)階向(huan)(huan)(zhi)(shi)(shi)階(zhi)遗此(xiu),(ren)所產生(fei)(fan)(zui)(ying)(ying)(ying)(ying)(song)外來(fei)(fan)(zui)(ying)(ying)(ying)(ying)(qi)相同特(gui)Q(ben)即它(fu)(shi)(qing)ȝ()(mo)相偏極(kou)(gui)和傳播方(nan)(yang)均Z(nie)。由(ai)(kou)(jian)(zui)(ying)(ying)(ying)(ying)的(qing)數(ge)(ju)反而增(e),(ren)故吾(bang)稱(wei)L(lian)(lian)放(yi)(yi)大的(qing)(huan)(huan)用(ke)(mo)假a(ai)物質由(ai)(juan)(qiao)總(fu)數(ge)N(fei)(fan)(ying)(ying)(ying)(ying)(qi)i成Q(ben)我們將(zha)子(dao)(fei)能(shi)(shi)階簡化成(yang)高(jian)階E2和低(jian)兩(yao)(yao)?two-levelatoms)Q(ben)則(juan)述(fei)(dan)E(fu)得在E1和E2(jian)階(fei)(fan)(ying)(ying)(ying)(ying)(qi)目隨(que)E1(xiu)間(xun)(yao)(yao)變Q(ben)針E2(jian)階(yao)(yao)言(mo)?

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