Dr. Jiaqi Niu Profile

Dr. Jiaqi Niu

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 4 December 2024 Paper

Research on high-power DFB laser chips for laser photoacoustic spectroscopy

Huan Wang, Yanlin Zhu, Jiaqi Niu, Chuandong Zhang, Yongguang Huang

Proceedings Volume 13283, 132832U (2024) https://doi.org/10.1117/12.3036964

KEYWORDS: Photoacoustic spectroscopy, Quantum cascade lasers, High power lasers, Transformers, Light sources, Laser spectroscopy, Gases, Waveguides, Beam divergence, Signal detection

Read Abstract +

Laser photoacoustic spectroscopy is a detection technology for trace gas based on photoacoustic effect, which has important applications in monitoring the concentration of dissolved gas in transformer oil. The laser photoacoustic spectrum measuring device mainly includes a light source (laser), a photoacoustic pool, a sound sensor and a signal processing unit, in which the light source provides a long-term stable working narrow band laser for the measuring device, which is an important part. Among many laser sources, high-power DFB semiconductor lasers gradually replace other light sources with their advantages of miniaturization, high reliability, precise wavelength, and low cost. The higher the laser power, the higher the detection sensitivity. For the concentration monitoring of dissolved gas in transformer oil, this paper developed a high-power DFB laser with different characteristic gases corresponding to the absorption wavelength based on indium phosphide substrate material. The wavelength of DFB laser ranges from 1532nm to 1683nm, and the power output of more than 60mW can be achieved in this range. At the same time, the vertical divergence Angle of the laser is reduced through the waveguide extension layer, and the coupling efficiency of the laser is increased when it is packaged into devices.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

;

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years