• Steady retardance over certain spectral and temperature range • Ultra-thin Free standing single plate or constructed with substrates • Wide acceptance angle and precise retardance value • High damage threshold 1GW/cm2 (single plate versions) • Quartz: Wavelength Range 532nm-1550nm(Single Plate), >355nm (with BK7 substrate), or custom • MgF2: Wavelength Range >3000nm or custom
True Zero Order Waveplates are virtually an advanced version of zero order waveplates, with its operating bandwidth significantly increased than ordinary zero order waveplates. Unlike the net zero order waveplates which generate the resulting retardation from the difference of phase shifts in the two plates, true zero order waveplates are fabricated into ultra-thin pieces to provide exactly the required retardation (for example, a phase delay of precisely lambda/2 for a half waveplate). This feature imparted excellent consistency to wavelength change, ambient temperature change, and changes of incident angle to true zero order waveplates. Hangzhou Shalom EO offers multiple types of True Zero Order Half Waveplates and True Zero Order Quarter Waveplates furnished with highly anti-reflective coatings(R<0.2%):
Type 1: Quartz free-standing single plate
Although the freestanding version may be relatively vulnerable and might cause inconvenience to the fabrication and handling process, the virtue of this version resides in having high damage thresholds(>1GW/cm2@
1064nm,10ns,10Hz). Therefore true zero order waveplates with free-standing design are compatible with high-energy applications. The standard wavelengths of quartz true zero order waveplates range from 532nm-1550nm, whereas other wavelengths could be customized according to your requirements.
Hangzhou Shalom EO is capable to provide single plate true zero order waveplates of quartz, with a minimum thickness that produces π/2 phase delay for 800nm light source and π/4 phase delay for 1550nm light source.
Type2: Quartz single plate + BK7 substrate
The version with BK7 substrates is either cemented by NOA61 (Norland Optical Adhesive 61, it is an optical grade adhesive) or attached using the optical bonding technique to strengthen the waveplates for easier operation. For this version, Shalom EO is capable to produce the true zero order waveplates for wavelengths that are >355nm ((355nm excluded).
The modules cemented with BK7 substrates have the drawback of significantly reduced damage threshold (1~2J/cm2@1064nm,10n
s,10Hz). An approach to ease this problem is to assemble the BK7 substrate with the Quartz plate using diffusion bonding, which subsequently raises the damage threshold to 15J/cm2@1064nm,10ns,
10Hz.
Type 3: MgF2 true zero order waveplate
The true zero order waveplates made by Magnesium Fluoride are recommendable for long wavelengths operations (e.g. Wavelengths above 3000nm.)
• Steady retardance over certain spectral and temperature range
• Ultra-thin Free standing single plate or constructed with substrates
• Wide acceptance angle and precise retardance value
• High damage threshold 1GW/cm2 (single plate versions)
• Quartz: Wavelength Range 532nm-1550nm(Single Plate), >355nm (with BK7 substrate), or custom
• MgF2: Wavelength Range >3000nm or custom
True Zero Order Waveplates are virtually an advanced version of zero order waveplates, with its operating bandwidth significantly increased than ordinary zero order waveplates. Unlike the net zero order waveplates which generate the resulting retardation from the difference of phase shifts in the two plates, true zero order waveplates are fabricated into ultra-thin pieces to provide exactly the required retardation (for example, a phase delay of precisely lambda/2 for a half waveplate). This feature imparted excellent consistency to wavelength change, ambient temperature change, and changes of incident angle to true zero order waveplates. Hangzhou Shalom EO offers multiple types of True Zero Order Half Waveplates and True Zero Order Quarter Waveplates furnished with highly anti-reflective coatings(R<0.2%):
Type 1: Quartz free-standing single plate
Although the freestanding version may be relatively vulnerable and might cause inconvenience to the fabrication and handling process, the virtue of this version resides in having high damage thresholds(>1GW/cm2@1064nm,10ns,10Hz). Therefore true zero order waveplates with free-standing design are compatible with high-energy applications. The standard wavelengths of quartz true zero order waveplates range from 532nm-1550nm, whereas other wavelengths could be customized according to your requirements.
Hangzhou Shalom EO is capable to provide single plate true zero order waveplates of quartz, with a minimum thickness that produces π/2 phase delay for 800nm light source and π/4 phase delay for 1550nm light source.
Type2: Quartz single plate + BK7 substrate
The version with BK7 substrates is either cemented by NOA61 (Norland Optical Adhesive 61, it is an optical grade adhesive) or attached using the optical bonding technique to strengthen the waveplates for easier operation. For this version, Shalom EO is capable to produce the true zero order waveplates for wavelengths that are >355nm ((355nm excluded).
The modules cemented with BK7 substrates have the drawback of significantly reduced damage threshold (1~2J/cm2@1064nm,10ns,10Hz). An approach to ease this problem is to assemble the BK7 substrate with the Quartz plate using diffusion bonding, which subsequently raises the damage threshold to 15J/cm2@1064nm,10ns,10Hz.
Type 3: MgF2 true zero order waveplate
The true zero order waveplates made by Magnesium Fluoride are recommendable for long wavelengths operations (e.g. Wavelengths above 3000nm.)
