Toptica okuddaabiriza layisi ya semikondokita ya frequency emu

TopWave 405 eya Toptica ye layisi ya frequency ya semiconductor emu ekola obulungi ennyo ng’erina obuwanvu bw’amayengo agafuluma nga 405 nm (near-UV), eyeekenneenyezebwa nnyo mu by’okukuba ebifaananyi ebiramu (nga STED microscopy), light pairs, quantum optics, holography ne precision spectroscopy. Ebirungi byayo ebikulu bye bino: obuwanvu bwa layini obufunda (<1 MHz), okutebenkera kw’obuwanvu bw’amayengo obw’amaanyi (<1 pm) n’engeri y’amaloboozi amatono, ebisaanira okunoonyereza kwa ssaayansi n’embeera z’amakolero nga byetaagisa nnyo ku mutindo gwa layisi.

2. Ebirimu

Okufuluma kwa frequency emu

Okwettanira **External Cavity Differential Laser (ECDL)** design, nga kugatta wamu ne grating okutuukiriza feedback emu longitudinal module okukola, okukakasa layini enfunda n'amaloboozi ga phase matono.

Okutebenkera kw’obuwanvu bw’amayengo obw’amaanyi

Yazimbibwamu PZT (piezoelectric ceramic) telescope n’okufuga ebbugumu (TEC) okutuuka ku kusiba obuwanvu bw’amayengo n’okutebenkera okumala ebbanga eddene.

Omulimu gw’amaloboozi amatono

Okukozesa tekinologiya wa current drive ow’amaloboozi amatono ne active frequency stabilization technology (nga Pound-Drever-Hall frequency lock) okukendeeza ku maanyi g’amaloboozi n’omusingi gwa frequency.

Okutunula (Tunability).

Nga tutereeza enkoona y’ekisenge oba enkyukakyuka mu kasasiro/ebbugumu, ekirawuli ekigenda mu maaso mu bbanga lya GHz kituukibwako, ekisaanira okugezesa okusika mu spektral.

III. Ensengeka y’enzimba

Ensengeka enkulu eya Top Wave 405 esobola okwawulwamu modulo zino wammanga ezikulu:

1. Okusaasaana kwa layisi (LD) .

405 nm semiconductor laser chip (nga GaN-based laser diode) nga ensibuko y’ekitangaala enkulu.

Okufuga ebbugumu mu TEC kukakasa nti okusaasaana kukola ku bbugumu erisinga obulungi (ebiseera ebisinga ~25°C) okwewala obuwanvu bw’amayengo.

2. Enkola y’okuddamu mu bifo eby’ebweru

Conductive grating (Littrow oba Littman-Metcalf structure type): ekozesebwa okulonda obuwanvu bw’amayengo n’okuddamu kwa frequency emu.

PZT actuator: grating grating angle okutuuka ku fiber y’obuwanvu bw’amayengo obutuufu.

3. Okwawula amaaso n’okufuga mode

Faraday isolator: eremesa ekitangaala ekidda okutaataaganya okutebenkera kwa layisi.

Mode matching chart: erongoosa omutindo gwa beam era ekakasa TEM00 mode output.

4. Enkola y’okufuga ebyuma bikalimagezi

Low-noise current drive: egaba akasannyalazo ka LD pump current.

PID ebbugumu okufuga circuit: ddala okutereeza laser okusaasaana n'ebbugumu grating.

Module y’okusiba frequency (ey’okwesalirawo): nga PDH stable frequency, ekozesebwa ku nkola za layini enfunda ennyo.

5. Okuyunga ebifulumizibwa n’okulondoola

Endabirwamu y’okufulumya etunula ekitundu: ggyamu layisi ng’osigaza okuddamu mu kisenge.

Okulondoola kwa Photodiode (PD): okuzuula mu kiseera ekituufu amaanyi ga layisi n’okutebenkera kwa mode.

IV. Ensobi eza bulijjo n’ebirowoozo by’okuddaabiriza

1. Tewali kufuluma kwa layisi oba okugwa kw’amaanyi

Ensonga eziyinza okubaawo:

Okwonooneka kw’okusaasaana kwa layisi (ESD okumenya oba okukaddiwa).

Okulemererwa kwa drive mu kiseera kino (nga okwonooneka kwa modulo y’amasannyalaze).

Okuddaabiriza grating (okukankana kw’ebyuma kuleeta feedback okulemererwa).

Ebirowoozo ku ndabirira:

Kebera oba drive current ya bulijjo (laba omuwendo gw’okuteekawo mu ngalo).

Kozesa mita y’amasannyalaze okuzuula oba LD efulumya ekitangaala (obukuumi bw’obukuumi bwetaagibwa).

Ddamu otereeze enkoona ya grating okukakasa nti ekituli eky’ebweru kiddamu.

2. Obutabeera mu ntebenkevu mu buwanvu bw’amayengo oba mode hopping

Ensonga eziyinza okubaawo:

Okulemererwa okufuga ebbugumu (okulemererwa kwa TEC oba thermistor).

Okusumululwa kw’ebyuma (PZT oba grating tenywevu bulungi).

Okukankana okw’ebweru oba okutaataaganyizibwa kw’enkomerero.

Ebirowoozo ku ndabirira:

Kebera oba ebbugumu eryatekebwawo TEC likwatagana n’ebbugumu lyennyini.

Collagen optical platform okukendeeza ku kukankana kw’obutonde.

Kozesa mita y’obuwanvu bw’amayengo okulondoola n’okuddamu okuzuula bwe kiba kyetaagisa.

3. Tesobola kuteekawo bbanga lya ndabirwamu oba ndabirwamu

Ensonga eziyinza okubaawo:

Voltage ya PZT etamala (okulemererwa kwa circuit ya drive).

Grating mechanical stuck (okusiiga okutamala oba structural deformation).

V. Enkola z’okuziyiza okuddaabiriza

Bulijjo oyoza ebitundu by’amaaso

Kozesa ethanol atalina mazzi ne ppamba omuyonjo ennyo okuyonja endabirwamu ya grating ne output okwewala okukosa mode stability.

Okukebera n’okufuga ebbugumu

Kakasa nti TEC temuli nfuufu era nga ne ffaani ekola bulungi.

Obukuumi obutakyukakyuka (ESD) .

Yambala akaguwa akaziyiza okutambula (anti-static wristband) ng’okola okwewala okwonooneka kwa layisi.

Okufuga obutonde bw’ensi

Kuuma ebbugumu eritakyukakyuka (±1°C) n’embeera y’okukankana okutono, era kozesa ekifo eky’okwawula amaaso bwe kiba kyetaagisa.

Enteekateeka buli kiseera

Kozesa mita y’obuwanvu bw’amayengo ne mita y’amaanyi okutegeka ebifulumizibwa okukakasa nti binywevu okumala ebbanga eddene.

VI. Mu bufunzi

TopWave 405 single-frequency laser, n’obutebenkevu bwayo n’engeri zaayo enfunda ez’obugazi bwa layini, nnungi nnyo mu kunoonyereza kwa ssaayansi n’okukozesa mu makolero ag’omulembe. Okuddaabiriza buli kiseera, okufuga obutonde bw’ensi n’enkola entuufu ey’okuzuula ensobi kye kisumuluzo okulaba ng’ekola mu ngeri eyeesigika okumala ebbanga eddene. Ku bizibu ebizibu (nga frequency locking okulemererwa oba laser okwonooneka), kirungi okutuukirira ttiimu yaffe ey’ekikugu okwewala okwongera okwonooneka okuva mu kusasika kw’essimu.