enLanguage
Home / Products / Laser Module / 1.54μm/ 1535nm Eye-safe Laser Light Source

Product Categories

Latest Products

Contact Us

    • Tel: +86-29-81323155
    • Fax: +86-29-81323155

    • Email: info@loshield.com

    • Add: Green Land Blue Sea, Zhangba W Rd, Yanta District, Xi'an, Shaanxi, China, 710065

Search

Send Inquiry

1.54μm/ 1535nm Eye-safe Laser Light Source

The 1.54 μm microchip DPSS laser is a solid-state laser with a specific wavelength, characterized by its eye-safe wavelength and compact all-solid-state design. These characteristics make it indispensable in several key areas:

I. Core Advantages and Principles

Eye Safety: The 1.54 μm wavelength falls within the strong absorption band of water. Most of the laser energy is absorbed by the aqueous humor and lens in the anterior part of the eye before reaching the retina, greatly reducing the risk of permanent retinal damage. Its maximum permissible exposure is several orders of magnitude higher than that of common 1064nm lasers, making its safety level far superior to lasers near 1 μm.

Microchip DPSS Technology: A miniature chip integrating a laser crystal (such as Er:Yb:Glass) and a nonlinear frequency conversion crystal (such as PPLN) is pumped by a laser diode to directly generate 1.54 μm laser light. This design results in a small device size, robust structure, high efficiency, and maintenance-free operation.

II. Main Application Areas

1. Lidar and Ranging

Military and Security: It is the standard choice for military laser rangefinders and target designators. In training, exercises, and low-risk environments, it minimizes the risk of accidental eye injury to operators and friendly units.

Industrial and Surveying: Used for high-precision industrial ranging, topographic surveying, and drone obstacle avoidance, offering safer operation in environments with human presence.

Autonomous Driving: As one of the light sources for lidar, it has potential in public road testing and future applications where eye safety requirements are extremely high.

2. Free-Space Optical Communication

Military Secure Communication: Used for secure data links between ground stations, ships, or air-to-ground communications. The 1.54 μm wavelength has good atmospheric transmission characteristics (attenuation is lower than the 1.55 μm communication wavelength, but far superior to visible light), and the beam is less prone to diffusion, offering strong resistance to interception and interference.

Civilian Emergency and Private Network Communication: Used in scenarios requiring rapid deployment, high bandwidth, and where wireless radio frequency is limited or unavailable.

3. Environmental Monitoring and Spectroscopy

Differential Absorption Lidar: Utilizing the absorption lines of gases such as water vapor and methane near 1.54 μm, it remotely detects and measures the concentration distribution of these components in the atmosphere, used for meteorological research, greenhouse gas monitoring, and pollution source tracing.

Laser-Induced Breakdown Spectroscopy: Used as an excitation source in LIBS applications requiring a safer operating environment.

4. Scientific Research and Testing

Laboratory Light Source: As a standard light source at an eye-safe wavelength, used for optical experiments, detector calibration, and atmospheric transmission characteristics research.

System Testing and Evaluation: Used to test and evaluate the performance of other optical systems (such as infrared cameras and detectors).

5. Medical and Bioimaging (Exploratory Applications)

Optical Coherence Tomography: In OCT technology, the 1.54 μm wavelength can provide deeper tissue penetration depth (compared to the 1300nm window), suitable for dermatology or research on certain deep tissue imaging.

Surgical Assistance and Treatment: Its absorption by water makes it suitable for some delicate soft tissue surgeries.

Summary
The main applications of 1.54 μm microchip DPSS lasers are concentrated in active optoelectronic systems with extremely high requirements for eye safety, especially military/security laser ranging and free-space optical communication. It perfectly combines the high reliability of DPSS technology with the inherent safety and excellent atmospheric transmission characteristics of the 1.54 μm wavelength, making it the preferred light source solution in these professional applications.

Its "microchip" form further promotes miniaturization, low power consumption, and mass production of equipment, making it possible to integrate it into modern platforms such as portable devices, drones, and satellite communication terminals.This answer was generated by AI and is for reference only. Please verify the information carefully.

Are 1.54 μm and 1535nm the same product?

This is a very professional and precise question.

The simple and direct answer is: in most practical applications and product contexts, yes, they refer to the same thing. However, strictly speaking, there are slight differences technically. The following is a detailed explanation:

1. Essentially pointing to the same wavelength band (√ Core consistency)

In the fields of lasers and fiber optic communication, both 1.54 μm (micrometers) and 1535 nm (nanometers) refer to a wavelength near the C-band (conventional band) centered at 1540 nanometers.

Conversion relationship: 1 μm = 1000 nm, therefore 1.54 μm = 1540 nm.

Industry practice:

In the fields of lidar, rangefinding, and military applications, it is more common to use the "micrometer" unit, such as 1.54 μm or 1.55 μm, to refer to this "eye-safe wavelength."

In the field of fiber optic communication, nm is used as the unit with very high precision, because the channel spacing of DWDM systems can be as narrow as 0.8 nm or 0.4 nm. 1530 nm-1565 nm is the core range of the C-band.

Therefore, when you see a product labeled as a 1.54 μm DPSS laser, its actual output wavelength is likely to be between 1530 nm and 1550 nm. 1535 nm can be considered one specific wavelength value within this range.

2. Subtle technical differences (△ Accuracy differences)

1.54 μm is a general, colloquial expression. It broadly represents a laser "near 1540 nanometers." Due to factors such as Er (erbium) ion energy level transitions and crystal doping, the output of DPSS lasers usually has a small bandwidth (such as a few nanometers), and the center wavelength may also fluctuate slightly around 1540 nm.

1535 nm is a more specific and precise wavelength value. It may mean:

The laser is designed so that its output wavelength is locked to this very precise point of 1535 nm (for example, to match a specific gas absorption line for sensing).

In fiber optic communication DWDM systems, 1535 nm is one of the standard channels.

3. Why can they be considered the same in the context of your product (1.54 μm Microchip DPSS Laser)?

Identical Eye Safety Mechanisms: Both 1540nm and 1535nm wavelengths fall within the strong absorption band of water, sharing the core characteristic of "eye safety." Safety standards (such as IEC 60825) are defined for a range of wavelengths, and this band belongs to one of the safest categories.

Consistent Technical Implementation: Both are generated through the same physical mechanism—using a laser diode to pump an erbium-doped (or erbium-ytterbium co-doped) gain medium (crystal or glass), producing light near 1.55 μm through stimulated emission. The microchip design is merely a packaging form.

Highly Overlapping Application Scenarios: Both 1540nm and 1535nm are primarily used in fields requiring high safety and reliability, such as laser ranging, LiDAR, and free-space optical communication. Application systems are generally insensitive to this difference of a few nanometers.

We're professional 1.54 μm microchip dpss laser manufacturers and suppliers in China, specialized in providing the best products and service. We warmly welcome you to wholesale cheap 1.54 μm microchip dpss laser for sale here from our factory. Also, customized service is available.

whatsapp

Phone

E-mail

Inquiry

Bag