Nhazi ụzọ anya nke eriri polarized dị warara-ahịrị laser

Nhazi ụzọ anya nke eriri polarizedlaser dị warara nke nwere ahịrị dị warara

1. Nchịkọta

Laser eriri polarized nke nwere eriri dị warara nke 1018 nm. Ogologo ogologo ọrụ ya bụ 1018 nm, ike mmepụta laser bụ 104 W, obosara spectral nke 3 dB na 20 dB bụ ~21 GHz na ~72 GHz n'otu n'otu, oke mkpochapu polarization bụ >17.5 dB, na àgwà ighụ dị elu (2 x M – 1.62 na 2 y M) Asistemụ laseryana arụmọrụ mkpọda nke 79% (ihe dịka 1.63).

2. Nkọwa nke ụzọ anya

N'imeeriri polarized dị warara-ahịrị laser, eriri laser oscillator nke nwere eriri polarized n'usoro nwere eriri abụọ nke na-ejigide polarization na eriri polarization nke dị mita 1.5 n'ogologo, nke nwere eriri polarization nke dị mita 10/125 μm ytterbium nke nwere mkpuchi abụọ dị ka ihe na-enweta uru. Oke nnabata nke eriri optical a na 976 nm bụ 5 dB/m. A na-eji 976 nm nke nwere ogologo oge kpọchiri akpọchi na-eme ka oscillator laser ahụ gbapụta.laser semiconductornwere ike kachasị elu nke 27 W site na njikọta ogwe osisi polarity (1+1)×1. Grating dị elu nwere reflectivity karịrị 99%, bandwidth reflectivity 3 dB dịkwa ihe dị ka 0.22 nm. Reflectivity dị ala nke grating bụ 40%, bandwidth reflectivity 3 dB dịkwa ihe dị ka 0.216 nm. Ogologo ntụgharị uche etiti nke gratings abụọ ahụ dị na 1018 nm. Iji hazie ike mmepụta nke resonator laser na oke mmechi ASE, e mere ka reflectivity dị ala nke grating dịkwuo mma ruo 40%. A na-ejikọta eriri ọdụ nke grating dị elu na eriri gain, ebe eriri ọdụ nke grating dị ala na-atụgharị 90° ma jikọta ya na eriri ọdụ nke nzacha cladding. Ya mere, ọnọdụ kachasị elu nke ogologo ntụgharị uche ngwa ngwa nke grating dị elu dakọtara na ogologo ntụgharị uche dị nwayọ nke grating dị ala. N'ụzọ dị otu a, naanị otu laser polarized nwere ike ịgbagharị n'ime oghere resonant. A na-eji ihe nzacha mkpuchi nke aka ya nke a gwakọtara n'ime oghere resonant ahụ ehichapụ ọkụ mgbapụta fọdụrụnụ na mkpuchi eriri optical, a na-ebelatakwa pigtail mmepụta site na 8° iji gbochie nzaghachi ihu na mgbagharị parasitic.

3. Ihe ọmụma ndabere

Usoro mmepụta nke laser eriri nwere polarized n'usoro: N'ihi nrụgide birefringence, eriri na-ejigide polarization dị ka pear nwere axes polarization abụọ orthogonal, nke a maara dị ka axis ngwa ngwa na axis nwayọ. N'ozuzu, ebe ọ bụ na index refractive nke axis nwayọ dị ukwuu karịa nke axis ngwa ngwa, grating edere na eriri na-ejigide polarization nwere ogologo ebili mmiri abụọ dị iche iche n'etiti. Oghere resonant nke laser eriri nwere polarized n'usoro na-abụkarị gratings abụọ na-ejigide polarization. Ogologo ebili mmiri nke grating obere-reflection na grating elu-reflection na axis ngwa ngwa na axis nwayọ kwekọrọ n'otu n'otu. Mgbe bandwidth reflection nke grating na-ejigide polarization dị warara nke ọma, enwere ike kewaa spectra nnyefe na axis ngwa ngwa na ntụziaka axis nwayọ, ebili mmiri abụọ ahụ nwekwara ike ịma jijiji n'ime oghere resonant. Dịka ụkpụrụ oscillation abụọ nke grating na-ejigide polarization si dị, na nnwale ahụ, enwere ike iji usoro njikọta njikọta iji mezuo ya. N'oge ịgbado ọkụ, a na-ahazi axes na-ejigide polarization nke gratings abụọ ahụ. N'ụzọ dị otu a, elu nnyefe abụọ nke grating dị elu na-egosipụta kwekọrọ na nke grating dị ala na-egosipụta, yabụ enwere ike nweta mmepụta laser abụọ-wavelength.

N'ezie sistemụ na-ejigide polarization laser, skew linear bụ ihe ngosi dị mkpa maka inyocha njirimara mmepụta nke lasers nwere polarized n'usoro. N'ozuzu, oge nke grating dị elu na-egosipụta ihe karịrị nke grating dị ala. Iji nweta laser nwere polarized n'usoro nwere uru PER dị elu, naanị otu elu polarization kwesịrị ịma jijiji. Mgbe axis ngwa ngwa nke grating dị ala na-egosipụta ihe dị n'akụkụ axis dị nwayọ nke grating dị elu, ogologo ebili mmiri etiti na ntụziaka axis ngwa ngwa nke grating dị ala na-egosipụta ihe kwekọrọ na nke dị na ntụziaka axis dị nwayọ nke grating dị elu, ebe elu nnyefe na ntụziaka axis dị nwayọ nke grating dị ala anaghị adaba na elu nnyefe na ntụziaka axis ngwa ngwa nke grating dị elu. N'ụzọ dị otu a, enwere ike ịma jijiji otu elu nnyefe. N'otu aka ahụ, mgbe axis dị nwayọ nke grating dị ala dị n'akụkụ axis dị ngwa nke grating dị elu, ogologo ebili mmiri etiti nke axis dị nwayọ nke grating dị ala kwekọrọ na nke axis dị ngwa nke grating dị elu, ebe elu nnyefe nke axis dị ngwa nke grating dị ala adabaghị na nke axis dị nwayọ nke grating dị elu. N'ụzọ dị otu a, enwere ike ịma jijiji otu elu nnyefe. Ụzọ abụọ a dị n'elu nwere ike nweta mmepụta laser nke a na-agbanwe agbanwe n'usoro. Dịka ụkpụrụ oscillation laser nke a na-agbanwe agbanwe nke otu wavelength nke grating na-edobe polarization, na nnwale ahụ, enwere ike iji usoro njikọta orthogonal iji mezuo ya. Mgbe akụkụ nke njikọta nke axes na-ejigide polarization nke grating dị elu na grating dị ala bụ 90°, elu nnyefe na ntụziaka axis dị nwayọ nke grating dị elu kwekọrọ na elu nnyefe na ntụziaka axis ngwa ngwa nke grating dị ala, yabụ enwere ike nweta mmepụta nke laser eriri nwere otu wavelength n'usoro.