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it is going right into this optical
spectrum analyzer which is a scanning
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spectrum analyzer which is a scanning
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spectrum analyzer which is a scanning
fabry-perot cavity the output of
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fabry-perot cavity the output of
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fabry-perot cavity the output of
the spectrum analyzer then goes to an
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the spectrum analyzer then goes to an
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the spectrum analyzer then goes to an
oscilloscope over there
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as we can see on the oscilloscope we
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as we can see on the oscilloscope we
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as we can see on the oscilloscope we
have more than one frequency in fact we
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have more than one frequency in fact we
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have more than one frequency in fact we
have several frequencies
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have several frequencies
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have several frequencies
sometimes three and sometimes even four
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sometimes three and sometimes even four
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sometimes three and sometimes even four
the spacing of the modes here is
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the spacing of the modes here is
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the spacing of the modes here is
about 270 megahertz which is consistent
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about 270 megahertz which is consistent
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about 270 megahertz which is consistent
with the length of the of the laser
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with the length of the of the laser
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with the length of the of the laser
cavity of 56
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cavity of 56
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cavity of 56
centimeters