Pｈysiｃs anｄ ｉts apｐliｃation
Waｎgyu
Xｉ'an Univｅrsiｔy of Pｏstｓ and Ｔelecommuｎｉcatiｏns
Abstract: Froｍ 1９16 to ｎow, laser got a very gooｄ devｅloｐmeｎt， it can also be used in every ｆielｄ， todａy， let＇ｓ reｖｉew the ｄeveｌopmｅnt hisｔoｒy oｆ ｔhe lａsｅr, and iｌlｕstraｔｅs the aｐplicaｔion ｏf laser iｎ some ｉnduｓtries.
Pａｃs:０４3２．1+2
Kｅy wｏｒds: Laseｒ；hisｔｏry;apｐlication
Laser oｒiginated in ａ pｈysicists Einsteiｎ ，in １91６ Einsteｉn puｔ fｏrwaｒd a seriｅｓ of nｅw techｎｏloｇy theory,cａllｅd the Goａded Raｄｉａtioｎ． Thｅ tｈeｏry ｏｆ matter ｉs that ，in the atom, a number ｏｆ paｒtｉcles （ eｌecｔｒｏnic ） dｉsｔrｉbuted at varｉｏｕｓ levｅｌs aｎd iｎ high ｅnergy pａrｔｉｃｌes bｙ a ceｒtain level ｏf phｏtoｎs, wｉll dｒop ｆrｏm tｈe ｌeｖel ｔo tｈe sｍalｌest (laｍｂdatｒａｎｓiｔioｎ ） tｏ ｃhangelinｇ, thｅn wｉll thｅ ａnd stiｍulate it's just ｔhe sａｍe ｎaturｅ， aｎd iｎ ａ state, can be a faint light of the phenomｅnon. Thiｓ is ｃaｌled "ｇoａｄed radiation the ｌight oｆ tｈe enlargeｍent ｏf the ｌasｅｒ" for ｓhort．
Iｎ 1958, the Amｅricａn sｃienｔists Shaｗalｏw and Tｏwnｅs fiｎd a sｉｎgｕlar pheｎomenon : ｗheｎ thｅy wilｌ be ｌａｕncｈｅd iｎ the ｌighｔ ｂuｌb ｌight ｉn ａ ｒare earth eｌements ， crｙstal ｔhe moleｃuｌes ｏf a bright ａｎd alwayｓ geｔ ｔogether ａgain. Ａccordinｇ tｏ thiｓ phenomenoｎ， tｈeycame uｐ with the Laser Ｐrinciｐlｅ， by iｔｓ elementｓ ｉn ｔhe oscillatiｎｇ same freqｕencｙ ａｓ thｅ ｅneｒgy ａｎd motivatiｏn wilｌ pｒoｄuce tｈe skｉｎ ｏf liｇht - the ｌasｔer. Thｅｙ delivｅred impｏrtａｎt fｏｒ this papｅr．Aftｅ
物理英语论文 来自淘豆网m.daumloan.com转载请标明出处.
