Distributed Feedback (DFB) Laser Diodes – Turnkey Single-Frequency Operation
- Single-frequency operation due to intrinsic grating structure
- Wavelengths from 640 .. 2880 nm available
- Up to 150 mW output power
- Single mode (TEM00) beam profile
- Linewidth typ. 1 .. 5 MHz
- Frequency tuning via temperature (typ. 25 GHz/K)
- Rapid frequency modulation via current (typ. 1 .. 10 GHz/mA)
- Available in DL DFB systems
- All diodes also sold separately
Distributed feedback (DFB) laser diodes feature a grating structure within the semiconductor and thus operate in both longitudinal and transverse single mode. Tuning is achieved by modulating either the laser current or the chip temperature. Mode-hop free tuning is maintained over several hundred GHz. Applications include alkaline spectroscopy, laser cooling, gas detection and the generation of tunable cw terahertz radiation.
Available stocklists: Overview laser diode stock lists | DFB stock list
Technical Information
Technical Information
A variety of wavelengths is usually available from stock. In addition, TOPTICA can provide DFB diodes at customized wavelengths, even in low quantities – please inquire.
| Center wavelengths | 640 .. 685 nm*, 760 .. 2880 nm |
| Typical output power | 2 .. 150 mW |
| Typical coarse tuning | 2 .. 6 nm |
| Thermal tuning: typical range | > 1000 GHz |
| Electric tuning: typical range | 50 GHz |
| Typical linewidth (5 µs integration time) | 500 kHz – 4 MHz |
| Typical output beam characteristics | 3 mm x 1 mm |
| Typical output beam polarization | Linear > 100:1 |
| Thermal stabilization | ColdPack, TO-3 or butterfly package |
*Spectral coverage with gaps
Schematics of DFB and DBR laser diodes.
Patented ColdPack for thermal control of DFB diodes.
Emission spectrum of a DFB diode at 1545 nm. Incoherent background radiation is suppressed by > 50 dB.
Thermal frequency tuning of an 895 nm DFB diode.
Options & Related Products
Options & Related Products
- TO-9 mm package
- TO-3 package with built-in TEC and thermistor
- Butterfly package with built-in optical isolator and fiber pigtail
- Note: Some packages may only be available for certain wavelengths, please inquire.
Related Products:
- DL DFB: Complete laser solution with built-in DFB diode
- dfBeam: OEM laser module for Raman spectroscopy and interferometry
- ColdPack: TO-3 laser diode adapter with TECs and thermistor
- Fabry-Perot laser diodes: High power at low cost
- AR laser diodes: Anti reflection coating for best performance
- Tapered amplifiers: Semiconductor optical amplifiers
- Standard Laser Package for tunable cw terahertz generation
- Wavelength meters for precise wavelength measurements
Technical Drawings
Applications
Applications
Applications of DFB diodes include:
- Spectroscopy
- Laser cooling
- Gas sensing
- Generation of tunable cw terahertz radiation
Download
Download
Kraft-et-al-Laser-PhysLett-2004.pdf
