GENERAL INFORMATION
Nonlinear optical processes such as SHG, OPO, SPDC and SFG depend on phase matching, and phase matching depends on temperature. A drift of only 0.05 °C can shift the phase-matching peak, lowering conversion efficiency, broadening the linewidth and destabilizing the output wavelength.
The Ultra-Stable TEC Oven is built around a precision Peltier thermoelectric module and a PWM H-bridge controller. It holds the crystal within ±0.005 °C over 24 hours, giving it a stable thermal platform for consistent phase stability, wavelength stability and conversion efficiency.
KEY BENEFITS
- ±0.005 °C / 24 h stability – strong drift suppression for long experiments
- Bi-directional TEC – full H-bridge up to 10 A, heats and cools with equal precision
- 0.01 °C setpoint resolution – fine targeting for PPLN, PPKTP and LBO phase matching
- 20–75 °C range – custom versions up to 150 °C on request
- Medical-grade 9 VDC supply – isolated, quiet power with no electrical noise injected into the crystal circuit
- Standalone LCD panel – set point and actual temperature shown live, no PC or software required
- Pt1000 RTD sensor – better linearity and long-term drift stability than thermistors or Pt100
- Compact – 110 × 120 × 85 mm, fits existing optical breadboard setups
CHARACTERISTICS
| Temperature range | 20 °C – 75 °C (custom orders up to 150 °C) |
| Setpoint resolution | 0.01 °C |
| Temperature stability | ±0.005 °C / 24 hours |
| TEC module power | Up to 30 W |
| Driver output current | 4 A continuous / 10 A peak (full H-bridge) |
| Temperature sensor | 2-wire Pt1000 RTD |
| Input power | 9 VDC, medical-grade AC/DC adapter |
| Control technology | Pulse Width Modulation (PWM), bi-directional |
| Interface | Front-panel LCD, no PC required |
| Dimensions (L × W × H) | 110 × 120 × 85 mm |
| Operating ambient temperature | 0 °C – 40 °C |
| Storage temperature | 0 °C – 70 °C |
APPLICATIONS
- PPLN, PPKTP, LBO, BBO, KTP and LiNbO3 crystals, where the phase-matching bandwidth is often below 0.1 °C
- SHG lasers (DPSS and fiber) producing stable 532 nm, 355 nm and 266 nm output
- OPO systems, where signal and idler wavelength stability follows crystal temperature stability
- SPDC sources for quantum optics, where photon-pair rate and spectral purity are temperature sensitive
- Quantum communication and sensing R&D with experiments running for hours or days
- Hygroscopic crystals (KTP, BBO) kept warm and dry, set and left running
- OEM integration of crystal modules into standard breadboard layouts
APPLICATION NOTES
Stabilizing PPLN for SHG at 1064 nm. PPLN crystals for 532 nm generation typically phase-match at 30–60 °C. Even a 0.1 °C excursion reduces SHG efficiency by several percent. Holding the crystal within ±0.01 °C keeps the green output power constant through the whole laser session.
Reducing thermal drift in OPO and SFG setups. Passive crystal mounts drift with the lab HVAC cycle, typically ±0.5 °C to ±2 °C over hours. The oven decouples the crystal from its environment, reducing the ambient influence 50–100 times, so the output wavelength stays stable through multi-hour measurements.
SPDC sources for entanglement experiments. Bell tests, quantum key distribution development and photon-pair spectroscopy all need a drift-free crystal. The oven's stability meets the demands of sensitive quantum optical setups.
COMPARISON
| Parameter | Passive mount | Typical resistive oven | Ultra-Stable TEC Oven |
|---|---|---|---|
| Stability | ±1–2 °C, follows ambient | ±0.1 °C | ±0.005 °C / 24 h |
| Cooling | None | None (heat only) | Bi-directional TEC |
| Response | No control | Slow, large thermal mass | Fast Peltier response |
| Power input | N/A | AC mains, noise risk | 9 VDC medical-grade |
| PC required | N/A | Often (USB / software) | No, standalone LCD |
TESTED IN REAL PHOTONICS SETUPS
The controller has been validated in continuous 24-hour runs with PPLN crystals used for 532 nm SHG: the temperature stayed within the specification band for the whole session, with no overshoot and no drift events.
- PWM algorithm tuned to eliminate setpoint overshoot on approach
- Medical-grade isolated power supply removes electrical interference at the source
- H-bridge driver validated to 10 A peak, with integrated thermal protection
Custom configurations and OEM orders are welcome. Now you can order this device directly from us: contact us