Nā palena kumu o ka ʻōnaehana laser

Nā palena kumu o kaʻōnaehana laser

Ma nā kahua noi he nui e like me ka hoʻoili waiwai, ka ʻoki ʻana i ka laser a me ka ʻike mamao, ʻoiai he nui nā ʻano o nā ʻōnaehana laser, kaʻana pinepine lākou i kekahi mau ʻāpana kumu maʻamau. ʻO ka hoʻokumu ʻana i kahi ʻōnaehana terminology parameter unified hiki ke kōkua i ka pale ʻana i ka huikau i ka ʻōlelo a hiki i nā mea hoʻohana ke koho a hoʻonohonoho pono i nā ʻōnaehana laser a me nā ʻāpana, a laila e hoʻokō ai i nā pono o nā hiʻohiʻona kikoʻī.

Nā palena kumu

Loʻihi nalu (nā ʻāpana maʻamau: nm a μm)

Hōʻike ka lōʻihi o ka nalu i nā ʻano alapine o nā hawewe māmā i hoʻokuʻu ʻia e ka laser ma ke ākea. Loaʻa i nā hiʻohiʻona noiʻi like ʻole nā ​​koi no nā nalu nalu: I ka hoʻoili waiwai, ʻokoʻa ka helu absorption o nā mea no nā nalu kikoʻī, e pili ana i ka hopena o ka hana. Ma nā noi ʻike mamao, aia nā ʻokoʻa i ka absorption a me ke keakea ʻana o nā hawewe like ʻole e ka lewa. Ma nā noi lapaʻau, ʻokoʻa ka absorption o nā lasers e nā poʻe o nā kala ʻili like ʻole ma muli o ka lōʻihi o ka nalu. Ma muli o ka wahi liʻiliʻi liʻiliʻi, nā laser lōʻihi pōkole a menā mea uila laserLoaʻa iā ʻoe ka pōmaikaʻi i ka hana ʻana i nā hiʻohiʻona liʻiliʻi a pololei, e hoʻohua ana i ka hoʻomehana peripheral liʻiliʻi loa. Eia nō naʻe, ke hoʻohālikelike ʻia me nā laser me nā lōʻihi hawewe lōʻihi, ʻoi aku ka nui o ke kumukūʻai a ʻoi aku ka maʻalahi o ka pōʻino.

2. Ka mana a me ka ikehu (Nā wae maʻamau: W a i ʻole J)

Hoʻohana pinepine ʻia ka mana laser i nā watts (W) a hoʻohana ʻia e ana i ka puka o nā laser mau a i ʻole ka mana maʻamau o nā laser pulsed. No nā lasers pulsed, pili pono ka ikehu o ka pulupulu hoʻokahi i ka mana awelika a me ka hoʻohālikelike ʻana i ke alapine repetition, me ka ʻāpana he joule (J). ʻOi aku ka kiʻekiʻe o ka mana a i ʻole ka ikehu, ʻoi aku ka kiʻekiʻe o ke kumukūʻai o ka laser maʻamau, ʻoi aku ka nui o ke koi ʻana o ka wela, a ʻoi aku ka paʻakikī o ka mālama ʻana i ka maikaʻi beam maikaʻi.

Puke puʻupuʻu = ʻawelike mana repetition rate Pulse energy = average mana repetition rate

3. Ka lōʻihi o ka puʻupuʻu (Nā ʻāpana maʻamau: fs a ms)

ʻO ka lōʻihi o ka pulse laser, ʻike ʻia hoʻi ʻo ka laulā pulse, ua wehewehe ʻia ʻo ia ka manawa e lawe ai no kalasermana e piʻi i ka hapalua o kona piko (FWHM) (Figure 1). He pōkole loa ka laulā pulse o nā laser ultrafast, maʻamau mai nā picoseconds (10⁻¹² kekona) a i ke attoseconds (10⁻¹⁸ kekona).

4. Laki hana hou (nā wae maʻamau :Hz a MHZ)

Ka helu hou ana o alaser puʻupuʻu(ʻo ia hoʻi, ka pinepine o ka hoʻopiʻi ʻana o ka pulse) e wehewehe i ka helu o nā pulu i hoʻokuʻu ʻia i kēlā me kēia kekona, ʻo ia hoʻi, ka pānaʻi o ka manawa pulse spacing (Figure 1). E like me ka mea i ʻōlelo ʻia ma mua, ʻo ka helu hoʻihoʻi ʻana he like ʻole me ka ikehu pulse a pili pono i ka mana maʻamau. ʻOiai e hilinaʻi pinepine ʻia ka helu repetition i ka medium gain laser, i nā manawa he nui, hiki ke ʻokoʻa ka helu repetition. ʻOi aku ka kiʻekiʻe o ka helu hou ʻana, ʻoi aku ka pōkole o ka manawa hoʻomaha wela o ka ʻili o ka mea optical laser a me kahi kikoʻī hope loa, a laila e hiki ai i ka mea ke wela wikiwiki.

5. ʻO ka lōʻihi o ka hui ʻana (nā ʻāpana maʻamau: mm a i ke knm)

Loaʻa i nā lasers ka pilina, ʻo ia hoʻi, aia kahi pilina paʻa ma waena o nā waiwai o ke kahua uila i nā manawa like ʻole a i ʻole nā ​​kūlana. ʻO kēia no ka mea ua hana ʻia nā lasers e ka hoʻoulu ʻia ʻana, ʻokoʻa ia mai ka hapa nui o nā kumu kukui ʻē aʻe. I loko o ke kaʻina hana hoʻolaha holoʻokoʻa, hoʻonāwaliwali mālie ka coherence, a ʻo ka lōʻihi o ka coherence o ka laser e wehewehe i ka mamao i mālama ʻia ai kona coherence kino i kekahi nuipa.

6. Polarization

Hoʻomaopopo ka polarization i ke kuhikuhi o ke kahua uila o nā nalu māmā, e kū mau ana i ke kuhikuhi o ka hoʻolaha ʻana. I ka hapanui o nā hihia, ua hoʻokaʻawale ʻia nā lasers, ʻo ia hoʻi ke kuhikuhi mau ʻia ka māla uila i ka ʻaoʻao like. Hoʻopuka nā kukui non-polarized i nā māla uila e kuhikuhi ana i nā ʻaoʻao like ʻole. Hōʻike pinepine ʻia ka degere o ka polarization e like me ka ratio o ka mana optical o ʻelua mau mokuʻāina polarization orthogonal, e like me 100:1 a i ʻole 500:1.