Isolator 材料探討﹗
一般Isolator都lens ﹑wedge﹑ rotator等構成﹐有誰知道他們的參數?還有Isolator的磁環磁通量及磁場強度是多少? <TABLE borderColor=#ffffff height=180 cellSpacing=0 cellPadding=0 width=428 border=1><TR><TD vAlign=center align=middle width=51 height=35><DIV align=center><FONT color=#003399>Crystal</FONT></DIV></TD><TD vAlign=center align=middle width=63 height=35><DIV align=center><FONT color=#003399>c </FONT></DIV><DIV align=center><FONT color=#003399>±0.05</FONT></DIV></TD><TD vAlign=center align=middle width=63 height=35><DIV align=center><FONT color=#003399>a </FONT></DIV><DIV align=center><FONT color=#003399>±0.05
</FONT></DIV></TD><TD vAlign=center align=middle width=54 height=35><DIV align=center><FONT color=#003399>b</FONT></DIV><DIV align=center><FONT color=#003399>±0.05</FONT></DIV></TD><TD vAlign=center align=middle width=61 height=35><DIV align=center><FONT color=#003399>θ </FONT></DIV><DIV align=center><FONT color=#003399>±0.2°
</FONT></DIV></TD><TD vAlign=center align=middle width=75 height=35><DIV align=center><FONT color=#003399>φ </FONT></DIV><DIV align=center><FONT color=#003399>±0.1°
</FONT></DIV></TD><TD vAlign=center align=middle width=59 height=35><DIV align=center><FONT color=#003399>AR coating </FONT></DIV></TD></TR><TR><TD vAlign=center align=middle width=51 height=22 rowSpan=3><DIV align=center><FONT color=#003399>LiNbO3 </FONT></DIV></TD><TD vAlign=center align=middle width=63 height=22><DIV align=center><FONT color=#003399>0.25</FONT></DIV></TD><TD vAlign=center align=middle width=63 height=22><DIV align=center><FONT color=#003399>1.25</FONT></DIV></TD><TD vAlign=center align=middle width=54 height=22><DIV align=center><FONT color=#003399>1.25</FONT></DIV></TD><TD vAlign=center align=middle width=61 height=22><DIV align=center><FONT color=#003399>12°</FONT></DIV></TD><TD vAlign=center align=middle width=75 height=22><DIV align=center><FONT color=#003399>22.5°</FONT></DIV></TD><TD vAlign=center align=middle width=59 height=53 rowSpan=3><DIV align=center><FONT color=#003399>R0.2% </FONT></DIV><P align=center><FONT color=#003399>@1550nm
</FONT></P></TD></TR><TR><TD vAlign=center align=middle width=63 height=20><DIV align=center><FONT color=#003399>0.25</FONT></DIV></TD><TD vAlign=center align=middle width=63 height=20><DIV align=center><FONT color=#003399>1.25</FONT></DIV></TD><TD vAlign=center align=middle width=54 height=20><DIV align=center><FONT color=#003399>1.25</FONT></DIV></TD><TD vAlign=center align=middle width=61 height=20><DIV align=center><FONT color=#003399>13°</FONT></DIV></TD><TD vAlign=center align=middle width=75 height=20><DIV align=center><FONT color=#003399>22.5°</FONT></DIV></TD></TR><TR><TD vAlign=center align=middle width=63 height=7><DIV align=center><FONT color=#003399>0.25</FONT></DIV></TD><TD vAlign=center align=middle width=63 height=7><DIV align=center><FONT color=#003399>1.25</FONT></DIV></TD><TD vAlign=center align=middle width=54 height=7><DIV align=center><FONT color=#003399>1.25</FONT></DIV></TD><TD vAlign=center align=middle width=61 height=7><DIV align=center><FONT color=#003399>15°</FONT></DIV></TD><TD vAlign=center align=middle width=75 height=7><DIV align=center><FONT color=#003399>22.5°</FONT></DIV></TD></TR></TABLE><P><FONT color=#003399>光洁度：10/5 平面度： λ/4 </FONT><FONT color=#003399 size=3>@</FONT><FONT color=#003399>633nm </FONT></P> 謝謝梁山好漢﹗我還有個問題想問一下﹐就是怎么去計算磁環的磁通量?它的磁場強度要多少才能達到Faraday Rotator 旋轉45度的要求呢? <P><b><FONT color=#000066>To dandy002:</FONT></b></P><P><b><FONT color=#000066>It depends on the material of the rotator. In general, 1000G in the center of the magnet is enough if you use Garnet film.</FONT></b></P> 楼上的要生产ISOLAOTR这条线吗？主要是晶体跟角度的稳合。还有你的做法了！ <v:shapetype>
<P><v:shapetype><v:stroke joinstyle="miter"></v:stroke><v:path connecttype="rect" gradientshapeok="t"></v:path></v:shapetype><v:shape><v:textbox style="mso-next-textbox: #_x0000_s1026"></v:textbox></v:shape>
<TABLE cellSpacing=0 cellPadding=0 width="100%">
<TR>
<TD>
<DIV class='shapev:shape="_x0000_s1026"'>
<P><v:shapetype><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path connecttype="rect" gradientshapeok="t" extrusionok="f"></v:path><LOCK aspectratio="t" v:ext="edit"></LOCK></v:shapetype><v:shape><v:imagedata></v:imagedata></v:shape></P></DIV></TD></TR></TABLE>光隔离器是一种只允许单向光通过的无源光器件，其工作原理是基于法拉第旋转的非互易性。如图2
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P>
<P><v:shape></v:shape>
<TABLE cellSpacing=0 cellPadding=0 width="100%">
<TR>
<TD>
<DIV class='shapev:shape="_x0000_s1027"'>
<P><B>图２<FONT face="Times New Roman"> </FONT></B><B>光隔离器原理图<FONT face="Times New Roman">
<P></FONT></B>
</DIV></TD></TR></TABLE>
<P>
<P><BR clear=all>
<P>ＬＮ晶体双折射率为n<SUB>e</SUB>-n<SUB>o</SUB>=0.08,隔离器中的起偏和检偏器可用ＬＮ光楔来制作，这种隔离器的特点是，光隔离度适中（38-50dB），批量性好，材料制作工艺成熟，成本低，易实现工业化生产。
<P>
<P><v:stroke joinstyle="miter"></v:stroke><v:formulas><v:f eqn="if lineDrawn pixelLineWidth 0"></v:f><v:f eqn="sum @0 1 0"></v:f><v:f eqn="sum 0 0 @1"></v:f><v:f eqn="prod @2 1 2"></v:f><v:f eqn="prod @3 21600 pixelWidth"></v:f><v:f eqn="prod @3 21600 pixelHeight"></v:f><v:f eqn="sum @0 0 1"></v:f><v:f eqn="prod @6 1 2"></v:f><v:f eqn="prod @7 21600 pixelWidth"></v:f><v:f eqn="sum @8 21600 0"></v:f><v:f eqn="prod @7 21600 pixelHeight"></v:f><v:f eqn="sum @10 21600 0"></v:f></v:formulas><v:path connecttype="rect" gradientshapeok="t" extrusionok="f"></v:path><LOCK aspectratio="t" v:ext="edit"></LOCK></v:shapetype><v:shape><v:imagedata></v:imagedata></v:shape></P><img src="data/attachment/forum/dvbbs/2004-8/2004812154524239.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'data/attachment/forum/dvbbs/2004-8/2004812154524239.gif\');}" onmousewheel="return imgzoom(this);" alt="" />
页:
[1]