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Quasi-Bragg
immersion grating

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23456HISi, GeUVWX=Y

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6HI? (2);<6!"6`aa) Birefringence Bragg Binary (3B) grating6bc=d? FG6ef3ghijkl3B grating hmnopq)rstpuQv6wx&'ySz{HIkl|FGh}~•€ Volume binary grating •‚ƒ„…{†€45‡ˆ,2‰mŠ456‹6Œv•„Ž 1‰m6••‘p’“pN”•–JST A-Step —˜™‘’š›œ•žŸh jkl|HIklFG2345•
45¡¢Nr£¤y¥¤¦§h@kly¨©ª«¬Š45¡¢Nr£¤-«®20¯30°£¤yFGŽ°±²³´‘¢µy¥¤kl–¶ 1Ÿ|·¸¹º»¼½¾¿Àp™)60ÁÁÂÃhj†{23./hÄÅklvÆÇŠ¶ 2 6SÈyFG6¥¤£¤vÉÊËÌ£¤6./Ž-†ÆvŽ0zl|²RŠÍÃÎÏ45¡¢Nr£¤yFGŽ¥¤klÐÑyŠS ÒÁ6./Ž 0%ŠP ÒÁ6./Ž 450nm yR†{ 20~30%y²€vÓÔ¨«…{†€|ÕlŠÖa×Øy×ÙhÚÛ•€ÆvySÏŠFGvÜÝ456Þß6f3/ŽÉÊàá•€lâyãÎk6äy²€Ævhåækl|? ¶ 1 FG2345–Birefringence Bragg Binary (3B) gratingŸ6 1 ç23Á6ÒÁ‘è)P|? ? é†êÚ•45¡¢Nr–‹6ëì£¤vËÌŠíîïðyñòŸŠóô†êÚ•ÒÁ£õ|? ?
¶ 2 FG23456ÒÁ23./|ö•÷°./6øùúïû|ü†êÚ•45¡¢Nr£õŠé†êÚ•FG6¥¤£õŠé†ýþ•ÄÅÿh!"kløþ|? ÕlŠFGh#ž•€•†‹6ÜÝ2345$%£g&G'(6%£g[)npujOPQNvk{Š*+X;°,••(¢’-)Nq).6Í/hijk{LMNOPQN6ÜÝ2345hHIk
l|01Š45‡ˆ 2, 3, 4‰m 6 3 23Š-‘p4p5Q6)Q–L&SŸ1:1 645Ž 1 7y89„…
l*Q¢h:Ï{‹6•„Ž 5~10‰m BÂ6ÜÝ456HIh;zl|k-kŠ‹ŽíîÕœ<_k²†ÐÑ–¶ 3 =Ÿ$íîv6>?gŽ@A{45ŽB…{kÕ†Š÷CDE²WXhÓF•ÆvŽGHœIzl|JÆœŠOPQN6K™Lu6”IMvNO•€lây45‡ˆ 20‰mŠL&S 1:1 6*Q¢hj†{‹6•„Ž 100‰m BÂ6ÜÝ45hHIkl|¶ 3 ö•*Q¢6àPhQÁk{HIkl45‡ˆ 20‰m 6ÜÝ23456RST×5UVWXYœI€|íîh 30Z[\{]^kllâŠ_^„…l‹6`a 46.7mm -«‹6•„• 46.7/sin30=93‰m œI€ÆvŽ0zl|K™Lu6”IMvNO•€v‹6bðycd6ÈeÏŽfg{†€ÆvŽª-zl|hiŠ45‡ˆ$ÈeÏ6^jŠOPQN6kl$1mnhJK•€lâ6Á,ÃÄjy 10o10¯20o20 [mm] BÂ6p‘
o645‡ˆ 20‰m 6ÜÝ2345hHIqœI€|b) rsµ456 Immersion grating? ÷t 10 u6v&Gw‘4³p5X]6xyŽDzÕkAŠ-{Âœ|}6d²†[p5~r$•‘NŽNO€•Kœžìœ±€SÈy²zl|v&Gw‘4³p5X]yS€rsµ456
Immersion grating 6Ýµ{Â$WX‚ƒhJK•€lây§„,&'… ¼½Á,ã578n).v6wx&'ySÏ÷†6v&Gw‘4³p5[p5~r–¶ 4 =Ÿ$ V •‘N–¶ 4 q‡Š¶ 4 ö6SÈyˆ6•A†‰Š‹¼yVŒ²ð•ÏŽ@„…{†€Ÿh••è)Nr{Â6Ž{>WXby••\{Š•r*‘Z.$m“’píîy V ‹6UVWXh;zl|? ?
¶3 LMNOPQN6-4Q6¢NÜÝ456UV“”ÃÄÅ–=Ÿv×5UVWXY–öŸ
|=,45‡ˆ2‰mŠL&S 1:1|‹Ž•†lây•å²•„6ÄÅ•GH|ö,45‡ˆ20‰mŠL&S 1:1Š
‹6•„93‰m|q‡6–•OPQN6—„–‹6•„ŸhÄÅ•€lâ6*Q¢Q˜P|

¶4 v&Gw‘4³p56[p5~r–=Ÿv•‘N–q‡ŠöŸ|q‡6¶ð•™26WX=Yyj†lw‘4³p5•‘N|ö6×5UVWXY•R•‘N6¼½P0|? HYWX6&"Š¼;&'yR†{šgWX³)56›œÿv„…{†€UÏ•žŸ 0.2‰myR†{v&Gw‘4³p56[p5~r–v‹Š¶5=ŸvV•‘N6†¬…6ÐÑyR†{¨•r*‘Z.vm“’p6†¬…¨ ¡²ïð¢„Ž£«…€ÆvŽ0zl|„«yUÏ•žŸ0.5Š1.0Š2.0‰myR†{••r*‘Z.–¶5q‡Ÿvm“’p–¶5öŸ6†¬…¨¤gWX³)5y²ÏŠUÏ•žŸŽ°±†É¥ïð¢„Ž°±A²€ŽŠ¦§²Ævy¨ÂŽ°±†m“’pSÏ•r*‘Z.6ïð¢„6£Ž°±AŠn)©pu¨c†[¤ŽÓ«…l|lªkŠ
m“’pv•r*‘Z.íîïð6&GðŽ%²€lâyJ6^jh^S•€«¬ŽI€|tAqyO)´UVW$×5UVWyS€ïð¢„$-ðÝµ6ÄÅh;ÈšÅœI€|?
? v&Gw‘4³p5X]•w‘4³p5®¯nvNOklÐÑyUÏ•žŸŽŒ„†lây°ðÔyp°~“±)w6²³hWX•€6y•´¤±œI€|J6lâŠrsÝµ6Immersion
grating6”I£µvk{UVySÏ°Õ-²‹ÝµhWXk{Šv&Gw‘4³p5X]h‹6¶ðRSTbð6·›¸WXyij•€v¹.œI€ÆvŽ0zl|c) Quasi-Bragg immersion grating? Quasi-Bragg immersion gratingv•’“o.6ºðy[†l•†‹645h¥»kŠ‹6bðy
R†{¼½¾ySz{Á¿hºðyËÌyÀ±ŠºðyR†{•½¾k{Š‹6bðœÁT¼½¾•€†k†2345œI€|Quasi-Bragg immersion grating6”I£µvk{016Ã9œ•Ž{>WXbyw‘mpuÂ)h••\{[†l•†‹6456WXh;È£µhÃÄk{†l|k-kŠNTT-ATÅv6ÆÑÇySz{ŠÈÉhÊðyË?klÌ-Qn6íîhÔÍklÎy
WÏk{Ð?•€£µŽ¹ÑœI€ÆvŽ0zllâŠ¼¬•ÖÒT6Quasi-Bragg gratinghHI•€Ævy²zl|™2HIkl2Ó6Quasi-Bragg gratingyÔ†{O)´Áhj†{23ÁhÕÖklvÆÇŠ1Ó•´"¼²Ž«-ç62345vk{bc•€ÆvŽ0zl–¶6 =Ÿ
|¶5 v&Gw‘4³p5 [p5~ryS€m“’píî6UV–L-‘K)NŸWX–=Ÿ
|q‡›PŽWXP0ŠJ6öv×£6ÌþP0ŽWXØž6‹|v&Gw‘4³p5 V•‘NySz{UV–mÙ)°ŸWX„…l•r*‘Z.–q‡Ÿvm“’p–öŸíî|¶6 HIklQuasi-Bragg grating623Á–Far-field imageŸ|=vq‡•ÈÉhÊðyË?
klt0.3mm6Ì-Qíî6ÔÍŠö•ÚðyÈÉhË?klt0.26íîhÌÛ10‰m6Ì-QÜ)ohÝžklÞ?ßySÏÔÍ|†¬…¨ž¾RST23‰–àu-)u‰Ÿ•45Z|
á61Ó•cd6‡ˆg•Ó«…€ŽŠÛâÁ62345vk{•bck²†{ÂœIzl–¶6q‡Ÿ|²RŠãäyHIklÚðyÈÉhË?klíîhQ6)pvk{Ì-QÜ)ohÝžk
lÞ?ßySÏÔÍklQuasi-Bragg gratingy•‡ˆgŽÓ«…¬ÛâÁ62345vk{•¼Abck²†{ÂœIzl–¶6 öŸ|d) J6áŠÜÝ23456ÒÁ23./60ÁÄÅŠVPH grating6å)QNÕÖ
? 22D6FG2345–3B gratingŸ6HIjy•žkl45‡ˆ,2‰mŠL&S 1:1Š456•„Ž2‰m6Volume binary grating6••‘p’“pN”•6ÒÁ23./60ÁæghÄÅkl|J6&"ŠSÒÁŠPÒÁv¨y1,550nm–°-)u‰=22.8ZŸyR†{23./Ž90%BÂŠçÿŒŽè1,000nm–çÿéë,1150, 2150nmŸœI€ÆvŽ0zl|Æ6Æv•¼;&'yR†{êë„…{†€SÈyÜÝ2345ŽVPH gratingvxìyíî6rsÝµ6ïðïþT2345–1,550nmyR†{160ð/mmŠ
ž¾‰+23‰~14ZSÏ-01œ•./Žñ×ŸSÏ-01yR†{¨./Ž-AŠVPH grating6òó6ôõŒh_!œ±€Ævhåækl|? 3B gratingv6NORSTŠ•ö€Ñ÷W6ÕÄø»ny†ù”I•€u“o.6JKjvk{323
6VPH (volume phase holographic) grating–Wasatch Photonics”Ÿh•žkl|Æ…«6VPH gratinghQuasi-Bragg gratingvxìyO)´Áhj†{23ÁhÕÖkl&"Š†¬…¨úûŽFOCAS$MOIRCSjy”IklVPH gratingvNü{å)QNŽc†ÆvŽ0zl|æyHD™‘’vý•€Bragg‰45Z6VPH grating•01v•ËÌ6£¤yaþœa€†’)QNŽ›×y2Óh…Š01£¤ydka…{ËÌynƒÿy4Ó6å)QNŽåæœ±€|²RŠÆ…«6VPH
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6? Í//•#2? 1· ìòŸv K(%)

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m“’pZ[\)·? ì23450ÁÃÄ=‘)Nj?76ot0.97@20o20K)N?100ot0.5@20o20K)Nv&Gw‘4³p5[‹Û: 0.5, ‹ë: 0.25
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1 >98,070 2013u 6E20A

2 >49,350 2013u 7E20A

2 >27,300 2013u 7E20A

1 Ó105,840 2013u 8E 2A

1 Ó

131,250 2013u 9E20A

1 >81,738 2013u10E31A

VPH grating?25, 600, 1145 L/mm

2 Ó99,991 2013u11E20A

VPH grating?25, 1624 L/mm

1 Ó56,490 2014u 1E21A

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NTT-ATŠ
Quasi-BragggratingòŸ

v K(%)

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136,500

36,500

6/27, 28

125,140

25,140

7/31

153,500

53,5008/5-8

134,200

34,200

9/19-21

155,620

55,62010/15-18

153,940

53,94010/30-11/2

133,690

33,69011/13-15

137,320

37,32011/18-20

17,0007,000

134,200

34,20011/27-29

128,71028,71012/4, 5

129,140

29,14012/11, 12

127,220

27,22012/17, 18

139,580

39,58012/26-28, 30

120,890

20,890

1/18, 20

12,620

2,620

1/24

150,580

50,580

2/3-7

137,700

37,700

2/18-21

138,690

38,6903/1, 3-5

134,340

34,340

3/26-282 Ó

349,650

699,300
1,380,150

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