X10468_15 Datasheet, PDF (4/9 Pages) Hamamatsu Corporation – LCOS-SLM (Liquid Crystal on Silicon - Spatial Light Modulator)

LCOS-SLM (Liquid Crystal on Silicon - Spatial Light Modulator)
X10468/X13267/X13138 series
Operating characteristics
Light utilization efficiency
The X10468/X13267/X13138 series have high light utilization efficiency, which is defined a ratio of the 0th order diffraction light level to
the input light level. The high light utilization efficiency mainly depends on reflectivity, and the amount of diffraction loss caused by the
pixel structure. We adopted advanced CMOS technology to make the diffraction loss smaller. As a result, the diffraction loss is less than
5%. The -02/-03/-04/-05/-06 types have a dielectric mirror which has high reflectivity. Therefore, these types have very high light utilization
efficiency. The -01/-07/-08 types have relatively low light utilization efficiency compared to the ones with the dielectric mirror but have wide
spectral response characteristics.
Phase modulation
The X10468/X13267/X13138 series can achieve phase modulation of
more than 2 π radians over the 400-1550 nm readout wavelength range.
The X10468/X13267/X13138 series comes pre-calibrated from the fac-
tory for a specified wavelength range to have more than 2 π radians of
phase modulation and its linear characteristics. Figure 2 shows typical
phase modulation characteristics. A phase shift of 2 π radians or more and
a linear phase response are achieved. The phase modulation curves for
95% pixels lies within +/- 2 σ.
[Figure 2] Phase modulation (typical example)
(Ta=25 °C)
2.5
2.0
1.5
1.0
0.5
Average
+2σ
-2σ
0
-0.5
0
32 64 96 128 160 192 224 256
Input signal level
KACCB0271EA
4