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VCSEL laser tube for portable devices
Portable device specific laser tube (ultra-high conversion efficiency) with ultra-high electro-optical conversion efficiency, wearable, the new darlin
Product details
Portable device specific laser tube (ultra-high conversion efficiency)
Ultra high electro-optical conversion efficiency, a new darling for wearable and portable device designers!
Keywords: wearable device light source, VCSEL，LED，LD， Electro-optical conversion efficiency, VIXAR
In recent years, with the rapid development of wearable devices, the issue of battery capacity has become a major problem limiting the widespread adoption of various light sources. Traditional LEDs and laser diodes (LDs) have relatively low photoelectric conversion efficiency and high power consumption. However, at the same time, battery technology has been stagnant, unable to find breakthrough new technologies to increase battery capacity, which makes it difficult for various wearable and portable devices to persist throughout the entire workday. In this case, VCSEL laser tubes have become the new darling of wearable and portable device designers due to their extremely high electro-optical conversion efficiency. Compared to ordinary LDs and LEDs, VCSEL laser tubes have significantly increased electro-optical conversion efficiency, which can greatly save the electricity used for barcode scanning and thus improve the usage time of handheld devices. It is also worth mentioning that the heat generation of VCSEL is much lower than that of various LD laser tubes and LEDs.
Meanwhile, VCSEL also has advantages such as spot symmetry and small divergence angle. Greatly simplify the optical design of the light source.
| Parameter | Symbol | Units | Minimum | Typical | Maximum | Notes |
| Threshold current | Ith | mA | 0.5 | 1.3 | 2 | |
| Operating voltage | Vf | Volts | -- | 2.4 | 2.7 | |
| Series resistance (VCSEL) | Rs | Ohms | -- | 100 | -- | |
| Slope efficiency | SE | mW/mA | -- | 0.5 | -- | |
| Optical output power | Lop | mW | 1.7 | 2.2 | 2.7 | T=30°C |
| Optical output power | Lop | mW | -- | -- | -- | T=50°C |
| Optical output power | Lop | mW | -- | 0.9 | -- | T=70°C |
| Reverse breakdown voltage | V | 10 | -- | -- | Ir | |
| ≤ 1nA | Operating wavelength | λop | 675 | 680 | 695 | |
| nm | Spectral width (RMS) | Δλ | nm | -- | 3 | |
| -- | Beam divergence 1/e2 | deg | 21 | -- | -- | |
| Whole | angle | Beam divergence FWHM | FWHM | 16 | deg | -- |
| -- | Whole | angle | 0.045 | Wavelength temp. coefficient | ||
| nm/°C | -- | -- | Rise time | 80 | ps | |
| -- | -- | 20%-80% | Fall time | 80 | ps | |
| -- | -- | 20%-80% | -130 | Relative intensity noise | RIN | |
| -- | -- | DC | 5 | to 3 GHz | Modulation bandwidth (-3 dB) |
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