[IEEE CLEO/Europe Conference on Lasers and Electro-Optics - Glasgow, Scotland (14-18 September...
1
11.45 CFI4 An lntegrated Optic Appoach to lOllm LlDAR R M Je.lllS. R W J De\ereux and A F Blokle\ Lar� and Photoltlcs Depament. Defence E\ aluaHall and Research .genc) Rꝏm PAW. St Andrews Road. Mahan. Worceslershlre Enland. U.K RH PS PhOlle 44 1684 89508+/�95{R'. Fa\ 4� J64 8!J166 rmjenkms(a,dra.lung gb The paפr a nol inat optics proach to herent IO.6pm LAR sysLeS II bas on usmg hoUow wavc:guid to gUide light n � lt in a nmlOli :ltnc sub1e The conpt referr llow �3vegui Inteat tm OW-IO), amltagcs in relaon to aching mainining g herent ng efficieJld and tl1al to: U size. i ruggness ]ovr nufactunng fi a plan V!e' photoph of a HOW-TO inteerometer subs,'Slcm �hich f ha\'f m pi. The mtegratcd ꝏmponents and interconnecting waveguis are c1earl)' visible TIl subsyst was in + lROxJ90xZmm lycltalJine al umIna SubSlralC usillg a computer nfroll lmU;lIg machine Polycrystalhn alumina was chusl as the substrate and lid material cause its o p tical pTpenies. In c�nJunl1n with \\'heldcs of approprIate css sectIon all\ Ille realisatIOn of 101\ anenuationcœfficientsat IO(,m In practice tht subs; .st ,as based on 20 tuIll WIde w31cgllldes The assciared alignmem slots tꝏk mnents which were 20 0 l square and" 0 mm thick Although the 1<IT�e W3yeguide crm,s seclwll IS Idel fOT ing the hiE1l power transmitter hms (."Omonl) reqmrcd In laser radar �stems. 11 also leads to the waveguIdes mg Inhrenl1� multImmk. As a consequence misalignment al the poims where olle wa,eguid Íupk.s to anolh via an integrated transmissl\ or rene�l1ve componellt call cause hJghcr order mode excilailn at the e�פnse of ndamental mode coupllng. ThiS pros scriousl) impairs �S1em פrfonnance In this context. where A IS the wa\'elellglh of Ihe progating radian and a IS the guide dth. field overlap integral calculauons mdicated that anlar and laLeral aligncnt tolcran ± } Oa and ± a lO, respectivel)', slluld prOVide ndamental mode power coupling effiCIenCies of - 95 Te results wefe ued the basis for the chimng tolerances utihzed in tbe manufaclme of the subsystem. r p 5 ' (i) e erlYlllg tretil wo. (it) fhe manucture of the b�stem . (UI) Its t The latter mclud ment" oftransmiu �er le\'els . The mset to the fil illustt proftJ ar "B" "'C"' [UOIlUlg Ull al 'X' te tt g fumental fidelity is achi ill pm Further to this. arate assments of coherent miξng ficicy gerat a VUE I c\.cess 8 of the mrettl maXlmlIDl Tn oonjuncuon lh a laser . some miVrive optics and a dettor, the ,ubs;ste11l was demonstrated oratloll " SImple \ibrometer The ul g the wo IS to l full.' mtegrat HOW�IO ste in .. \inch all ꭐ acth and SI"C areintel UlIO tile e dieli c te The onl� temal oomnell! would the large aפre n� optic e tnltJl\e te!e If tilC approacll shod lead to a ne» neraon of 10.6 lIl la r The unrlying conpthould also applIble at other wavelen to fonns of p 12.00 CFI5 Studies on laser rangf-gated imaging. ave Steinvall. Gor Bolander Depl.ufL3scrSylems DI",s.lnn of"en.�urTe:hn{llogy Defence Re�t'ardl Es(abJi�ltenl (fOAl P.O. Box 1165, S-5fll II LII1l.6pin SWEDE Tel +46 D 3126,1: Fa +46 n lJ66 E'Mail Qveste@'imfoa.se.gorooi@'lin foa e �� t : : i �g refer� 10 lhE principle of l ime :lmtrollmg camera with respect til a � ubcd illuminating SOUTce Thi .. tcchl1lque was sludied for night photography in reconnai�'ian�e applicatlOn, fo th thermal IR tcchmques \\ere wiael) adopt. In the early days puls xenon lamps 'cre us and Ihey w Ihen repla�d by lasers. Ty there sem to be a �ome""ha( mr51 [or gO Wg holh lor under\\ aler and atmꝏpheTic applications. l . i" due the de\�lllplllcnt on Doth lh laser the �amera side. Poyerful diode plIllld la�eS d calilera tube� with higher st1nl d time resolution )11 make thl� tedlJliquc d intere�tmg complement to SIVC EO-imaging AnlOng tile pote nllo! .ml·'H1!gC� for laser galed viewm we r not: . B!ter angular re�oluuon for tile same dperlurc Sl2e when Ltlmparcd \I·jth tlle;'Tlallnfrared. TIm glvcs an interesting cmplemen( for cla",ification ftargeb u�tetrd Dr the IR·�ystcm or a raddr Opllcal hack ground suppressIOn due to a sho range gale Suppre��l\}n 01 l lllcrfermg l �r reflections from 1he lEn-am Range tll targC'l nn he ohLdlnllogcthcr vIlh imaging infonnation. ImpTOed largel ueteehOIl b) silhollett�detctjoll. . CaJl3hliity \0 �tt through mok aDd other obscurant� and Improved ather פnelratmn eompar to short ",avdn�lh pa;"IYC O,sslem� OT VISual ,ystem� ntUer Jetetlol1 capahilit)' wh�n looklllg inl vegetatlUn, buildin> d cars for amp n o[]cntlonal TV orvl�i\1 "\)SCrvatlon ElIerapablllty \0 locate pmnt renCCfS sucll land marks In tne form of eorner reflector reflex tapes etc e Cemredon net+ frOn! of the car bakground, target in em hind nell silhQuen.e FI�re 1. Prmcipie and o.amp/ oj8(11ed 1'1�in8 re.� !lr� (FOA Dept. ofl� . r SPIms). Bedc mlhlry pph�a\J01l5' cj"jlmn appiJeations of gald viewing for ah alld rescue i o and vehicle enhanc:ed Ylsion" and other arpllcatlOn aTe I progress. This talk investigates the performance for gated VltWlIl syste� during dllTcrent alml}�ph�ic conditions induding ObSClITa . nb . . Example� of gated Images wi!! 1"'cn well a, a di,C"l!ssion 0+ galed sy"kms in dJfferet appllcalmns. , See for e<lmple pro)�ct ERASER and JOA.NAH I Joint Warflghting Skn� and Technology Plan, US Dept. of Dcfcn�e Plan. Ma} 1996 'DnJs Bonnier ."Rangc-gated active-Imaging s)'sie f �earch·and·rc�cue and surcillanc DperaLion�··. pp I :q·j45,SPIE .01 2744, Orlando Apnl 1996 '" P. P("n(lko.�kl. "A low COS! vehicle·muunted enhanced "islon �)stem comp�ise? of a lar illummater and a ranc-gatedcamcra", pp. 222·227. SPIE vol. 27:·6, Orlando Apnl19Y6 Friday / 389
Transcript of [IEEE CLEO/Europe Conference on Lasers and Electro-Optics - Glasgow, Scotland (14-18 September...
![Page 1: [IEEE CLEO/Europe Conference on Lasers and Electro-Optics - Glasgow, Scotland (14-18 September 1998)] CLEO/Europe Conference on Lasers and Electro-Optics - An Integrated Optic Approach](https://reader037.fdocumentos.com/reader037/viewer/2022100204/5750abbb1a28abcf0ce1b416/html5/thumbnails/1.jpg)
11.45 CFI4
An lntegrated Optic Appl"oach to lOllm LlDAR
R M Jenk.lllS. R W J De\ereux and A F Blol,kle\ Laser� and Photoltlcs Department. Defence E\ aluaHall and Research .I\genc)
Room PAW!!. St Andrews Road. Mahan. Worceslershlre En!;land. U.K V\lRH :';PS PhOlle 44 1684 89508+/�95{)oR'. Fa.\ 4� J6l\4 8!J4-166
rmjenkms(a,dra.lung gb
The paper describes a novel integrated optics approach to coherent IO.6p.m LTDAR sysLeJIl!S The COIlrepI IS based on usmg hoUow wavc:guides to gUide light bcrnCl:n romponell.� l(X;ated in a conmlOli dl.\::lcctnc substra1e The concept referred to as EQllow �3veguidc Integrated Qptm (HOW-IO), lias am'aJltagcs in relation to achieving and maintaining good coherent mi...ang efficieJldes and has lhe potenl1al to: redUtt size. increase ruggedness and ]ov.-cr manufactunng costs The figure shmvs a plan V!e\\.' photograph of a HOW-TO interferometer subs,'Slcm �hich \'\f ha\'f realtsed m practice. The mtegratcd oomponents and interconnecting waveguides are c1earl)' visible TIlt' subsystem was formed i n 11 lROxJ90xZ(Jmm polycl'vstalJine al umIna SubSlralC usillg a computer confrolled lmU;lIg machine Polycrystalhnt: alumina was chus�:ll as the substrate and lid material because its o p tical pT!1penies. In c�nJunC:l1!1n with \\'hegl.lldcs of approprIate cross sectIon allD\\ Ille realisatIOn of 101\
anenuationcoefficientsat IO(,jJ.m
In pra ctice tht subs;.stc:rn ,-,as based on 20 tuIll WIde w31cgllldes The ass(lciared alignmem slots took components which were 20 0 mIll square and" 0 mm thick Although the 1<IT�e W3yeguide crm,s seclwll IS Ide<ll fOT carr)ing the hiE1l power transmitter heams (.."Omrnonl) reqmrcd In laser radar �stems. 11 also leads to the waveguIdes bemg Inhc:renl1� multImmk. As a consequence misalignment al the poims where olle wa,eguid<: CDupk.s to anolhe:r via an integrated transmissl\'e or rene�l1ve componellt call cause hJghcr order mode excilail()n at the e�pense of fundamental mode coupllng. ThiS process scriousl) impairs �S1em perfonnance In this context. where A. IS the wa\'elellglh of Ihe propagating radiatIOn and a IS the guide half W!dth. field overlap integral calculauons mdicated that angular and laLeral aligruncnt tolcranc<:s of ± Ai} Oa and ± a lO, respectivel)', sll(luld prOVide fundamental mode power coupling effiCIenCies of - 95'% These results wefe u.<;ed as the basis for the machimng tolerances utihzed in tbe manufaclme of the subsystem.
The pafCr pfOVldes detail5 of' (i) the wulerlYlllg theoretical work. (it) fhe manufacture of the sub�stem and. (UI) Its optical assessment The latter mcluded measurement" oftransmiued po�er le\'els and beam profiles. The mset to the figllre illustrates proftJes ar apertures "B" ;md "'C"' [(JUOIlUlg UljeCtiOll al apcnurc 'X' The) indicate that good fundamental mode fidelity is achi:!Ved ill pmru(C Further to this. accurate a..'<sessments of the coherent mixing efficiency generated a ValUE III c.,\.cess of 80% of the meorettcal maXlmlIDl Tn oonjuncuon \l1lh a laser source. some trarumiVroceive optics and a detector, the ,ubs;.ste11l was demonstrated til opcratloll as " SImple \ibrometer The ultiJna.t(: goal of the work IS to re:llll..c full.' mtegrated HOW�IO S}stelllS in .. \inch all required acth-e and pasSI"C oomponcru..s areintegmled UlIO tile same die lectric Stbstrate The onl� extemal oomponell! would be the large aperture se.::on� optic of the transtnltJreeel\e te!eSMpe If successful tilC approacll should lead to a ne». generation of 10.6 iJlIl la'ieT radar systellls The underlying conceptlihould also be applIcable at other wavelengths and to other fonns of (lptlCalsystcm
12.00 CFI5
Studies on laser rangf-gated imaging.
ave Steinvall. Goran Bolander Depl.ufL3scrSy<;lems DI",s.lnn of"en.�urTe.::hn{llogy
Defence Re�t'ardl Es(abJi�ltrnenl (fOAl P.O. Box 1165, S-5fll II LII1l..6pinf' SWEDE!\" Tel +46 D 31::)26,1: Fa:>. +46 n lHHJ66 E'Mail Qveste@'imfoa.se.gorooi@'lin foa .. e
��t:-:::'i�g refer� 10 lhE principle of l ime l::lmtrollmg II camera with respect til a �ubcd illuminating SOUTce Thi .. tcchl1lque was sludied for night photography in reconnai�'ian�e applicatlOn, before thethermal IR tcchmques \\ere wiael) adopted. In the early days pulsed xenon lamps '''cre used and Ihey wert' Ihen repla�d by lasers. Tociay there st:!em to be a �ome""ha( renewed mrert�51 [or gmOO Ht""-Wg holh lor under\\ aler and atmoopheTic applications. Thl ... i" due to the de\.'�lllplllcnt on Doth lht:! laser and the �amera side. Poy.erful diode plIlllred la�ef"S and calilera tube� with higher spat1nl i:lTId time resolution \\')11 make thl� tedlJliquc and intere�tmg complement to pIDoSIVC EO-imaging AnlOng tile pote nllo! .ml·'H1!<lgC� for laser galed viewm;§' we ran not.:: . Br:!ter angular re�oluuon for tile same dperlurc Sl2e when Ltlmparcd \I·jth tlle;'Tlallnfrared. TIm glvcs
an interesting c('Implemen( for cla",ification (lftargeb u�te.;trd Dr the IR·�ystcm or a raddr Opllcal hack ground suppressIOn due to a short range gale Suppre��l\}n 01 l lllcrfermg l<i .. �r reflections from 1he lEn-am Range tll targC'l <cnn he ohLdlnt'lllogcthcr v,'Ilh imaging infonnation. ImpTO"\ed largel ueteehOIl b) silhollett�det,;:ctjoll. . CaJl3hliity \0 �tt through limoko: aDd other obscurant� and Improved "".",ather penelratmn eompared to short ",avdt:'n�lh pa;"IYC l:.O,s)'slem� OT VISual ,ystem�
ntUer JetC"etlol1 capahilit)' wh�n looklllg inl{) vegetatlUn, building-> Wid cars for a.tmp!c than \':o[]"\cntlonal TV orvl�I,li\1 "\)SCrvatlon
E<;:lIer<-apablllty \0 locate pmnt renCClOfS sucll as land marks In tne form of eorner reflector -or reflex tapes etc
e.
BI Cemredon net+ frOn! of the car ba;:kground, target in em behind nell silhQuen.e
FI;;�re 1. Prmcipie and o.amp/f' oj8(.11ed 1'1�""in8 re.� .. !lr� (FOA Dept. ofl�.l . .rer SPIt'ms).
BeSoldc mlhl<J.ry i1pph�a\J01l5' cj"jlmn appiJeations of galt!d viewing for sean:h alld rescueio and vehicle
enhanc:ed Ylsion" and other arpllcatlOn aTe III progress. This talk investigates the performance for gated VltWlIlg: systern� during dllTcrent alml}�ph�l'ic conditions induding ObSClITa
.nb ..
Example� of gated Images wi!! Ix: g:1"'cn as well a, a di,C"l!ssion 011 galed sy"kms in dJfferertt appllcalmns.
, See for e;;<lmple pro)�ct ERASER and JOA.N"NAH III Joint Warflghting Skn�t' and Technology Plan, US Dept. of Dcfcn�e Plan. Ma} 1996 'D,;-nJs Bonnier ."Rangc-gated active-Imaging s)'siern for �earch·and·rc�cue and sur'l.cillanct: DperaLion�··. pp I :q·j45,SPIE .01 2744, Orlando Apnl 1996 '" P. P("n(lko.",.�kl. "A low COS! vehicle·muunted enhanced "islon �)stem comp�ise? of a laser
illummater and a ran!"'c-gatedcamcra", pp. 222·227. SPIE vol. 27:·6, Orlando Apnl19Y6 Friday / 389
