nanoplus fabricates DFB-Laser diodes at wavelengths between 760 nm and 2,8 µm.
Here you can find some exemplary devices - but please note that nanoplus can provide DFBs at ANY wavelength in the range 760nm to 2.8µm:
| 760 nm DFB | 852 nm DFB | 894 nm DFB | |
| 935 nm DFB | 980 nm QD-DFB | 1742 nm DFB | |
| 1877 nm DFB | 2004 nm DFB | 2330 nm DFB | |
| 2740 nm DFB | Packaging |
If you need a FP or DFB laser with particular specifications (wavelength, power,...) please contact us.
nanoplus develops and manufactures innovative semiconductor lasers for various kinds of applications including gas sensing and atom spectroscopy as well as for telecom and medical applications. Both single- and multi-mode devices are available in the entire wavelength from 760nm to 2.8µm. Nanoplus lasers are available in chip form, submount, chip on submount assembly, various TO-cans and fiber coupled modules. Detailed data sheets of devices at various emission wavelengths can be found in the product section
Fig. 1: Single mode optical output power versus current for a 935nm DFB LD (mounted on TO9 header) at 25°C. A laser threshold of 16mA combined with a high differential efficiency of 0.87W/A is achieved and e.g. allows 10mW operation at drive currents below 30mA. Single mode distributed feedback laser diodes are compact versatile light sources for tuneable diode laser spectroscopy (TDLS). Nanoplus DFB laser technology is based on a unique and patented concept which allows to realize high performance DFB lasers on a wide variety of material systems covering the entire wavelength range between 760 nm and 2.8 µm. The nanoplus approach offers important advantages for DFB laser applications including an improved wavelength control and decreased sensitivity to back reflections compared to conventional DFB laser diodes. |
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TDLS techniques require a precise tunability of the DFB emission wavelength with either temperature or current for tuning the laser emission over a specific molecular absorption line. Fig. 2: Spectrum of a 935nm DFB LD (corresponding to the device shown in Fig. 1) at an optical output power of 45mW. DFB emission with a high side mode suppression ratio (SMSR) around 45dB is observed. Usually our DFB laser diodes are operated on a Peltier cooler (in the temperature range 20-50°C). Temperature tuning is used to shift the DFB wavelength close to the gas line to be monitored. To scan the gas absorption line itself, the DFB wavelength is usually varied by changing the drive current of the laser diode, which allows to sample a molecular absorption line with excellent spectroscopic resolution. The linewidth of the DFB laser typically lies below 5MHz and guarantees a high spectroscopic selectivity. |
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In the following, some specific device examples within the 760nm-2.8µm wavelength range are presented: Figure 1 shows the light output - current characteristics of a DFB laser diode in the 935nm wavelength range. A low laser threshold of 16mA and high differential efficiency of 0.87W/A result in a maximum single mode output power >60mW. A spectrum of the device at an optical output power of 45mW is shown in Figure 2. DFB emission with a high side mode suppression ratio (SMSR) around 40dB is observed. Fig. 3: Emission spectra of a 2003nm DFB LD at a constant optical output power of 2mW for various operating temperatures up to 45°C. Mode-hop free operation combined with a high SMSR is guaranteed in the entire specified temperature and power range of operation. Figure 3 shows emission spectra for various operating temperatures up to 45°C at a constant drive current and demonstrates the temperature tuning characteristics of a 2004nm DFB laser diode. For all temperatures, single mode emission is observed with a side mode suppression ratio >35dB covering a wavelength tuning range of more than 6nm. The temperature tuning rate of DFBs at this wavelength is typically 0.19nm/K. |
Current TuningFig. 4: Single mode emission wavelength versus operating current for different device temperatures (20°C, 25°C and 30°C). Typical current tuning coefficients around 0.025nm/mA are observed in this wavelength range. The \'fine tuning characteristics\' by current tuning of a DFB laser at 2µm is displayed in Figure 4 for three different operation temperatures. Typical current tuning coefficients around 0.025nm/mA are observed in this wavelength range. Figure 5 shows the linewidth of a 2003nm DFB laser diode measure by a homodyne high frequency technique. The DFB laser shows a linewidth of about 2.5MHz permitting high resolution spectroscopy of molecular absorption lines. |
| Fig. 5: Various packaging options are available for nanoplus DFB LDs at all wavelengths. Shown here are standard TO headers (e.g. TO5.6, TO9, TO8) with/without Peltier cooler as well as a fiber-pigtailed device. |
Different packaging options are available for nanoplus DFB LDs at all wavelengths. Shown here are standard TO headers (e.g. TO5.6, TO9, TO8) with and without Peltier cooler. Mounting on customer specific submounts and fiber packaging (pigtailed style) is also available upon request. Nanoplus is also fabricating DFB laser diodes based on new active materials including e.g. GaInAsN quantum wells or GaInAs quantum dots. If you are interested to obtain DFB lasers from your epi material, please contact us.
In order to provide lasers in the 5 - 10 µm wavelength range nanoplus is fabricating quantum cascade DFB lasers based on a license agreement with LUCENT Technologies.