An integrated optics beam combiner for the second generation VLTI instruments

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Table 4:

Tricoupler splitting ratio measured in wide band. The dispersion (rms) over 1024 measurements is 0.1%. The two first lines correspond to the wide band experiments while the third gives the average value and the variation amplitude over the wavelength range.
T	T₁	T₂	T₃	T₄
Chip 1	33.7-33.3-32.8	33.2-32.6-34.1	34.5-35.0-30.3	34.2-35.9-29.8
Chip 2	31.9-35.3-32.7	33.8-34.0-32.1	32.4-36.4-31.1	34.3-34.0-31.6
avg / $\Delta \lambda$	32.2/10.5-37.2/2.9-30.5/11.9	32.9/18.6-31.4/6.2-35.6/13.2	32.1/2.6-37.0/17.9-30.8/19.0	31.3/9.9-37.1/5.0-31.4/14.2

Source LaTeX | All tables | In the text

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