RTP (Rubidium Titanyl Phosphate)
RTP, which has only recently become commercially available, is the material of choice for many NLO and electrooptic applications. It’s high optical damage threshold makes it especially useful in high power SHG and OPO applications. RTP’s high electrical resistivity is important for many electrooptic applications, and in the production of Periodically Poled RTP elements.
RTP vs. KTP Comparison Chart
| Property | KTP | RTP |
| Type II SHG at 1064 nm | ||
| Phase matchable range (nm) | 980-1080 | 1050-1140 |
| Nonlinear coefficients (pm/V) | ||
| d33 | 16.9 | 17.1 |
| d31 | 2.5 | 3.3 |
| d32 | 4.4 | 4.1 |
| deff | 3.34 | 2.45 |
| Phase matching angle (deg) | 22-25 | 58 |
| Walk-off angle (deg) | 0.26 | 0.4 |
| Angular acceptance (mrad cm) | 20 | 20 |
| Temperature acceptance (℃ cm) | 25 | 40 |
| Transparency range (nm) | 350-4500 | 350-4500 |
| Other Properties | ||
| Wavelength of noncritical OPO 1064nm (nm) | 1570/3300 | 1600/3200 |
| Electro optical coefficients (pm/V) | ||
| r33 | 36.3 | 39.6 |
| r13 | 9.5 | 12.5 |
| r23 | 15.7 | 17.1 |
| Dielectric constant εeff | 13 | 13 |
| Optical damage ratio (to KTP) | 1 | 1.8 |
| Electrical conductivity along Z axis (Ω-1 cm-1) | 10-6-10-7 | 10-11-10-12 |
| Pyroelectric coefficient (C/cm2 K) | 7 × 10-9 | 4 × 10-9 |
EO結晶の比較表 Comparison of Electrooptic Materials
| Property | Units | RTP | KD*P | LiNbO3 | LiTaO3 | BBO | KTP | RTA |
| Transparency range |
µm | 0.35-4.3 | 0.2-2.15 | 0.35-5.5 | 0.3-5.5 | 0.19-2.6 | 0.35-4.3 | 0.35-5.3 |
| Refractive index |
1.9 | 1.5 | 2.2 | 2.2 | 1.6 | 1.9 | 1.9 | |
| Vλ/2 (1064nm) (L=d) - static |
kV | 8* | 9 | 8.5 | 5 | 46 | 8* | 8* |
| Temperature coefficient of Vλ/2 |
%/℃ | small | large | small | small | 0.1 | small | small |
| Dielectric constant,ε |
11 | 48 | 27.9 | 45 | 6.7 | 15.4 | 11 | |
| Laser damage threshold (AR coated) |
MW/cm2 | 600 | 500 | 280 | 400 | 1000 | 600 | 400 |
| Conductivity, σ33 |
S/cm | ～10-11 | <10-12 | <10-12 | <10-12 | <10-12 | <10-6 | <10-9 |
| Optical Homogeneity |
good | excellent | fair | fair | excellent | good | good | |
| Acoustic ringing |
no | yes | yes | no | small | no | no | |
| Temperature stability |
good | problem | problem | good | good | good | good | |
| Hygroscopic | no | yes | no | no | slight | no | no |
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- RTP (Rubidium Titanyl Phosphate) 結晶
133KB - EO結晶の比較表141KB
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