VCSELs are now widely used in our smart phones, bringing a lot of convenience to our daily life. Next, let's take a look at the common wavelength, power, principle, specific application and advantages of VCSEL for smartphone.
1. The common wavelength and power of VCSEL in smartphone
The commonly used wavelengths of VCSELs are mainly concentrated in the near-infrared spectrum, such as 940 nanometers. Light in this band is invisible to the human eye and therefore does not interfere with our vision. In terms of power, the VCSELs used in mobile phones are usually low in power, ensuring that they provide sufficient functions while also meeting safety standards ad will not cause harm to the human body.
940nm VCSEL of LEMON Photonics
2. the working principle of VCSEL in smarphone
In the iPhone, the VCSEL can be used as a light source for structured light technology, emitting a specific light pattern. When these light patterns are projected onto a face or other object, the phone's camera captures the reflected light patterns and processes them through a complex algorithm to parse out the 3D shape of the object. Structured light technology is highly accurate and robust, and is suitable for 3D sensing applications in a variety of complex environments and lighting conditions.
VCSEL is used in smartphone
3. The specific application of VCSEL in smart phones
Face recognition: VCSEL technology is widely used in the face recognition system of mobile phones. By projecting a specific pattern of infrared light onto the face, and then capturing the light reflected back, the phone is able to accurately identify the user's facial features, enabling fast unlocking and payment verification.
Gesture control: VCSEL technology also supports gesture control functions. By detecting the reflected light of the user's gestures, the phone can recognize different gestures and perform corresponding actions, such as turning pages, swiping, etc.
3D Modeling and measurement: With the laser projection and reception of the VCSEL, the phone can achieve 3D modeling and measurement of objects, which is particularly important in augmented reality (AR) applications, providing users with a more immersive experience.
4. Advantages of LEMON Photonics' VCSEL in smartphone
High accuracy: LEMON Photonics' VCSEL technology enables high precision distance and position measurement, providing reliable technical support for applications such as face recognition.
Low power consumption: LEMON Photonics' VCSEL have lower power consumption compared to other types of lasers, which is very important for extending cell phone battery life.
LEMON Photonics Addressable VCSEL
Miniaturization: The compact structure of the LEMON Photonics' VCSEL makes it suitable for integration into portable devices such as mobile phones without increasing the size and weight of the device.
High reliability: LEMON Photonics' VCSEL luminous performance is stable, long life, can adapt to the mobile phone and other consumer electronic products of high frequency, long-term use needs.
| VCSEL | Part No. | opticalPower（mW） | PCE | Mode | Chip Dimension（um） | |
| Typical Value | I(mA) | L x W (um) | ||||
| VCSEL Chip, 940nm, 10mW | LMV94001-C1 | 10 | 48% | CW | 11 | 225 × 225 |
| VCSEL Array Chip, 940nm, 200mW | LMV94020-C1 | 200 | 46% | CW | 240 | 425 × 425 |
| VCSEL Array Chip, 940nm, 1W | LMV94100-C2 | 1000 | 46% | CW | 1300 | 975 × 975 |
| VCSEL Array Chip, 940nm, 2W | LMV94200-C3 | 2000 | 43% | CW | 2500 | 975 × 975 |
| VCSEL Array Chip, 940nm, 3W | LMV94300-Q1 | 3000 | 42% | QCW | 3500 | 975 × 975 |
| VCSEL Array Chip, 940nm, 4W | LMV94400-C1 | 4000 | 45% | CW | 4700 | 1475 × 1475 |
As an integral part of modern smartphones, the development of VCSEL technology will continue to drive innovation and upgrading of mobile phone features.
