Deltronic Crystal Industries, Inc.
(973) 361-2222
PPLN & PPSLT Crystal Ovens
Applications:
- Thermal stabilization of PPLN and PPSLT crystals
- Quasi-phase-matched wavelength conversion
- Frequency doubling and mixing systems
- Laboratory and R&D laser platforms
- Production and OEM photonics systems
PPLN and PPSLT crystal ovens are designed to keep nonlinear optical crystals at a stable, precisely controlled temperature—an essential requirement for accurate and repeatable wavelength conversion in laser systems.
Because crystals such as PPLN and PPSLT are highly sensitive to temperature, even small fluctuations can affect performance. These bench-top ovens gently and evenly heat the crystal, ensuring consistent output, improved efficiency, and long-term reliability.
The system includes two parts:
-
A digital temperature controller, which precisely regulates heat
-
A crystal oven, which evenly distributes heat around the crystal
Together, they provide stable operation from room temperature up to 200 °C, making them ideal for laboratory, development, and production environments.
Technical Overview
The DTR Series Digital Thermo Regulator is a bench-top thermal stabilization system designed for nonlinear optical crystals such as PPLN and PPSLT. The system provides precise temperature control from ambient conditions up to 200 °C, ensuring stable quasi-phase-matched operation in nonlinear wavelength conversion applications.
The system consists of a microprocessor-based thermo controller module and a dedicated crystal oven. Operating in PID control mode, the controller regulates crystal temperature via a semiconductor switch output and an RTD temperature probe input. An embedded current-loop receiver combined with a 16-bit pulse-width modulator (PWM) delivers long-term temperature stability better than 0.05 °C RMS.
The crystal oven incorporates a nonlinear crystal holder, a temperature-to-current converter, and a coaxial heater designed to provide highly uniform thermal distribution. The oven housing is constructed from thermally insulating materials to minimize external temperature influence and improve stability.
Standard oven geometry accommodates nonlinear crystals with a 5 × 5 mm cross-section and variable crystal lengths. Larger crystal formats are available upon request.
Key Features and Benefits
- Temperature range from room temperature to 200 °C
- High-precision PID temperature control
- Long-term stability better than 0.05 °C RMS
- Homogeneous heating via coaxial heater design
- RTD temperature probe input
- Digital LCD display with intuitive controls
- Compact bench-top configuration
Specifications
Electrical
Power supply
24 VDC
2A max
Power consumption
Refractive Index, 1064nm
Electro-optic Coefficients at 633nm [pm/V] (constant tension)
r13 = 9.6 г22 = 6.8 г33 = 30.9
r51 = 32.6 rc = 21.1
Mechanical
Power supply
155 x 142 x 51 mm
Crystal Oven dimensions
Diameter = 50.8 mm
Length = crystal length [mm] + 26 mm
Crystal Oven mounting
2” laser kinematic mount (sold separately)
Environment
Operating humidity
20 … 80 RH% (without condensation)
Functional Features
Temperature range
A. 25-100 °C (DTR 100)
B. 25-150 °C (DTR 150)
C. 25-200 °C (DTR 200)
Heating/Cooling rate
2, 4, 6 and 8 °C/min
Temperature stability
0.02°C
Set point precision
0.1°C
Display resolution
0.1°C
Temperature Sampling rate
5 samples per second
Contact us to discuss specifications, custom requirements, or production volumes.
Call us at (973) 361-2222 or (973) 328-7000, or click here to contact us.