Visible, Near-IR, and Mid-IR Light Generation
NTT Innovative Devices produces periodically poled lithium niobate(PPLN) waveguide modules for visible, near-IR, and mid-IR light generation. The module consists of a PPLN waveguide, a thermoelectric cooler, and a thermistor. A custom design of the poling period is available. Please specify your pump and SHG/SFG/DFG wavelengths down to 2 decimal places when ordering modules.
FEATURES
The quasi-phase matched PPLN waveguide modules provide a variety of wavelength conversion capability without using cavity structures.
quasi-phase matching
Second harmonic generation(SHG), sum frequency generation(SFG), and difference frequency generation(DFG) are second-order nonlinear optical processes. The second order dipole polarization is induced by electric fields of input lights. In the phrase of quantum optics, a new photon is generated from input two photons. The interactions are expressed as follows;
SHG (for example 532 nm)
SFG (for example 578 nm)
DFG (for example 3 μm)
Quasi-phase matching is achieved by inverting the polarization every half of the coherence length with respect to the light propagation direction.
For more information, please refer following references.
- A. Yariv and P. Yeh, Photonics: Optical Electronics in Modern Communications (Oxford University Press, 2007)
- M. Asobe et al., IEICE Trans. Electron. E88-C, 335 (2005)
ridge waveguide
The wavelength conversion is limited by the beam divergence in bulk PPLN crystals. However, in PPLN waveguide, the wavelength conversion is enhanced by the beam confinement effect throughout the waveguide length. The conversion efficiency of the PPLN waveguide is two order of magnitude larger than that of bulk PPLN crystal.
Typical conversion efficiency of PPLN waveguide is larger than 100%/W at visible region. Conversion efficiency η is defined as
Pk = η Pl Pm
where Pk is output power (k = 2ω at SHG, ωp at SFG, ωi at DFG) while Pl and Pm are input power (l = m = ω at SHG, l = ωs and m = ωi at SFG, l = ωp and m = ωs at DFG).
DIMENSIONS
PIN CONNECTION
| No. | Description | No. | Description |
|---|---|---|---|
| 2 | Termistor | 6 | Termistor |
| 4 | Cooler (+) | 8 | Cooler (-) |
SPECIFICATIONS
(1)SFG (578 nm)
| Item | Spec |
|---|---|
| Model | WS-0578-000-A-B-C |
| Required pump wavelengths | 1030 nm 1319 nm |
| SFG wavelength | 578 nm |
| Efficiency | > 100 %/W When pump power is below 100 mW |
| Operation temperature(Top) | Typ.: >30 degree C Temperature fine tuning is required for satisfying the phase match condition |
| Thermister | B=3450 |
| TEC Current | 2 A max |
| Module size | 54 mm x 30 mm x 11.2 mm |
| Window | IR-cut filter or Visible-AR window |
| Input fiber※ | 980 nm PANDA fiber with FC / APC connector |
※WDM fiber coupler is not included.
780nm Light Generation
NTT Innovative Devices produces periodically poled lithium niobate(PPLN) waveguide modules for 780nm second harmonic generation(SHG). The module consists of a PPLN waveguide, a thermoelectric cooler, and a thermistor. A phase matching bandwidth (FWHM) of a standard 34mm-long waveguide module is 0.36nm at pump wavelength. A temperature coefficient for the wavelength tuning is 0.1 nm/deg C.
FEATURES
- SHG wavelength 780nm
- Conversion efficiency > 100% / W
» For more information about the PPLN waveguide.
APPLICATIONS
- Pump source for phase sensitive amplifier
- Rb atom spectroscopy
DIMENSIONS
PIN CONNECTION
| No. | Description | No. | Description |
|---|---|---|---|
| 2 | Termistor | 6 | Termistor |
| 4 | Cooler (+) | 8 | Cooler (-) |
SPECIFICATIONS
| Item | Spec | Spec |
|---|---|---|
| Model | WH-0780-000-A-B-C (space out) | WH-0780-000-F-B-C (fiber out) |
| Required pump wavelengths |
1560 nm | 1560 nm |
| SHG wavelength | 780 nm | 780 nm |
| Efficiency | > 100 %/W When pump power is below 100 mW |
> 50 %/W When pump power is below 100 mW |
| Operation temperature(Top) |
Typ.: > 30 degree C Temperature fine tuning is required. |
Typ.: > 30 degree C Temperature fine tuning is required. |
| Thermister | B = 3450 | B = 3450 |
| TEC Current | 2 A max | 2 A max |
| Module size | 54 mm x 30 mm x 11.2 mm | 54 mm x 30 mm x 11.2 mm |
| Window | IR-cut filter | none |
| Input fiber | 1550 nm PANDA fiber with FC / APC connector | 1550 nm PANDA fiber with FC / APC connector |
| Output | Space out | 850 nm PANDA fiber with FC / APC connector |