RTP Q-Switch

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RTP Q-Switch: Based on RTP crystal (isomorphous to KTP), it features large electro-optical coefficient, high damage threshold, wide transparent range (0.35 - 3.5μm), non-deliquescence, low loss, and suits high repetition frequency. No gray tracks under intense laser. Two crystals are 90° rotated around optical axis for static birefringence compensation. Utilizes transverse electro-optical effect, and operating voltage can be adjusted. It has good temperature stability, small piezoelectric ringing, suitable for wide temperature and high repetition frequency, applied in various fields.

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Product Features & Applications Physical & Optical Properties Product Specifications Standard Products

Product Applications:

Laser Q-switching

Pulse selector

Phase modulation

Cavity dumping

Attenuator

Product Features：

Low operating voltage: for example, the half-wave voltage of the QR5510A model product is about 2000V

Wide application wavelength range: 420 - 2800nm

Typical laser wavelength representatives: 755/1030/1064/1535/2100/2780nm

Wide operating temperature range: -50℃～+70℃

High resistivity:＞10¹¹Ω•cm

High damage threshold：＞10J/cm²@1064nm 10ns 10Hz

Low insertion loss：＜1%@1064nm

Good stability：non-deliquescence

No piezoelectric ringing effect, suitable for high repetition frequency applications (up to 100KHz)

Crystal Structure	Orthorhombic system
Lattice Parameters	a = 12.96 Å; b =10.56 Å; c =6.49 Å
Mohs Hardness	5
Density	3.6g/cm³
Melting Point	~1000℃
Ferroelectric Transition Temperature	~810℃
Color	Colorless
Thermal Expansion Coefficient (/k)	αx=1.01x10^-5, αy =1.37x10^-5, αz =-4.17x10^-6
Dielectric Constant Eeff	Eeff= 13.0
Thermo-Optic Coefficient (dλ/dT)	-0.029 nm /℃
Electro-Optic Constants	Y-CUT: r₅₁=38.5 pm/V X-CUT: r₃₃=35 pm/V,r₂₃=12.5 pm/V, r₁₃=10.6 pm/V
Nonlinear Coefficients	d₁₅ = 2.0 pm/V; d₂₄ = 3.6 pm/V; d₃₁= 2.0 pm/V d₃₂ = 3.6 pm/V; d₃₃ = 8.3 pm/V
Resistivity	~10¹¹-10¹²Ω·cm
Deliquescence	None
1064nm Half-Wave Voltage	2x2x20 mm: 800 V 4x4x20 mm: 1600 V 6x6x20 mm: 2400 V 8x8x20 mm: 3200 V
Transmission Range	350~4500 nm
Sellmeier Equation	nx²=2.15559+0.93307[1-(0.20994/λ)2]-0.01452λ2 ny²=2.38494+0.73603[1-(0.23891/λ)2]-0.01583λ2 nz²=2.27723+1.11030[1-(0.23454/λ)2]-0.01995λ2

Conventional Series Products (1064nm)

ProductModel	Half-Wave Voltage	Capacitance	Product Specification	W	H	L	Hc	D
QR2205A	1600V±15%	≤3.5pF	2×2×12	5.9	8.6	12	5.7	8
QR2210A	800V±15%	≤6pF	2×2×22	5.9	8.6	22	5.7	18
QR3305A	2400V±15%	≤3.5pF	3×3×14	7.3	10.0	14	6.4	8
QR3308A	1500V±15%	≤6pF	3×3×20	7.3	10.0	20	6.4	13
QR4405A	3200V±15%	≤6pF	4×4×14	8.7	11.5	14	7.1	8
QR4410A	1600V±15%	≤6pF	4×4×25	8.7	11.5	25	7.1	18
QR5505A	4000V±15%	≤6pF	5×5×14	10.1	12.9	14	7.9	8
QR5510A	2000V±15%	≤6pF	5×5×25	10.1	12.9	25	7.9	18
QR6605A	4800V±15%	≤6pF	6×6×14	11.5	14.3	14	8.6	8
QR6610A	2400V±15%	≤6pF	6×6×25	11.5	14.3	25	8.6	18
QR7705A	5600V±15%	≤6pF	7×7×14	12.9	15.7	14	9.3	8
QR7707A	3900V±15%	≤6pF	7×7×18	12.9	15.7	18	9.3	13
QR7710A	2800V±15%	≤6pF	7×7×25	12.9	15.7	25	9.3	18
QR8805A	6400V±15%	≤6pF	8×8×14	14.3	17.1	14	10.0	8
QR8808A	3900V±15%	≤6pF	8×8×20	14.3	17.1	20	10.0	13
QR8810A	3200V±15%	≤6pF	8×8×25	14.3	17.1	25	10.0	18
QR1005A	8000V±15%	≤6pF	10×10×14	16.5	19.6	14	11.4	8

Low-Pressure Series Products（1064nm）

Product Model	Product Specification	1/4Wave Voltage	Capacitance	W	H	L	H_c	D	Reference
QR7707C	7×7×18	2000V±150V	≤6pF	13.1	17.3	18	9.3	13	No discharge@2500V&2000Pa
QR7710C	7×7×18	1400V±150V	≤6pF	13.1	17.3	18	9.3	13	No discharge@2500V&2000Pa
QR8810C	8×8×25	1600V±150V	≤6pF	14.3	18.8	25	10.8	18	No discharge@2500V&2000Pa

Slab Series Products（1064nm）

Product Model	Product Specification	Half-Wave Voltage	Capacitance	W	H	L	H_c	D
QR080405AW	8×4×13	3200V±15%	≤6pF	17	6.5	13	4.5	12.6
QR100505AW	10×5×13	4000V±15%	≤6pF	19	7	13	5	14.6
QR120605AW	12×6×13	4800V±15%	≤6pF	21	7.5	13	5.5	16.6
QR080410AW	8×4×23	1600V±15%	≤6pF	17	6.5	23	4.5	12.6
QR100510AW	10×5×23	2000V±15%	≤6pF	19	7	23	5	14.6
QR120610AW	12×6×23	2400V±15%	≤6pF	21	7.5	23	5.5	16.6