cw Terahertz: Spectroscopy Extension
- Leading-edge photomixer technology
- GaAs and InGaAs-based emitter/receiver modules
- Fully packaged modules with SM/PM fiber pigtail
- Signal-to-noise ratio up to 80 dB
- Requires Standard Package
Available at 850 nm and 1550 nm, the Spectroscopy Extension employs the latest GaAs or InGaAs photomixer technology. The package has two versions with different levels of integration. The basic version features two fiber-pigtailed photomixers and a transimpedance amplifier. The second, or complete version, additionally includes positioning stages and off-axis parabolic mirrors. The system is conveniently controlled from a standard laptop or PC.
Technical Information
Technical Information
| Wavelength range | 853 + 855 nm | 1546 + 1550 nm |
| Semiconductor material | GaAs | InGaAs on InP |
| Emitter / receiver | 2 x photomixer | High-speed photodiode/ photomixer |
| Antenna type | Broadband log-spiral | Bow-tie |
| Terahertz scan range | 50 – 1800 GHz* | 50 – 1200 GHz* |
| Emitter bandwidth | > 3 THz | ~ 2 THz |
| Terahertz power (typ.) | 2 µW @ 100 GHz 0.3 µW @ 500 GHz** | 4 µW @ 100 GHz 0.5 µW @ 500 GHz |
| Terahertz SNR | 80 dB @ 100 GHz 70 dB @ 500 GHz*** | NEW: 80 dB @ 100 GHz NEW: 60 dB @ 500 GHz*** |
| Photomixer package | Cylindrical, Ø 1”, Integrated Si lens and SM/PM fiber pigtail | Cylindrical, Ø 30 mm, Integrated Si lens and SM/PM fiber pigtail |
| Recommended operating conditions | Laser power 50 mW Bias ± 10 V | Laser power 20 mW Bias 0 / -1.5 V |
| Transimpedance amplifier | PDA-S (included) | |
| Software | Control program with GUI inculded | |
| Terahertz optomechanics | U.r. (Complete Version) | |
| Key advantages | High bandwidth High SNR | Compact laser unit Low cost |
| * Corresponds to the tuning range of the DFB lasers. Other ranges on request. ** With High Power Extension. *** At 300 ms integration time. | ||
Standard package (green) and cw Terahertz Spectroscopy Extension (yellow). The dashed line shows the items of the basic version, the solid line shows the complete version.
Dynamic range of the 850 nm system for terahertz frequencies of 50 – 2000 GHz.
The dips are absorption lines of water vapor.
Fully packaged photomixers with Silicon lens and SM/PM fiber pigtail.
Options & Related Products
Options & Related Products
- Extended version: Precision alignment stages for photomixers, 2 off-axis parabolic mirrors, mirror mounts, optical rails
- Standard Package: DFB lasers for cw terahertz generation
- High Power Extension for best terahertz SNR
- Phase Modulation with twin fiber-stretcher
- FemtoFiber pro laser for time-domain terahertz applications
Technical Drawings
Applications
Download
Download
toptica_ScPaper_Sci_Instr_2008.pdf
toptica_ScPaper_New_J_Phys_2010.pdf
Roggenbuck_JOSA_B_2012.pdf
toptica_ScPaper_J_Infr_THz_Waves_2010.pdf
toptica_lang_deninger_photonik_2012.pdf
