High Power Extremely Narrow Linewidth Diode Laser for Polarizing 3He Target
The goal of this program is to develop a fiber coupled diode laser system with more than 200 W output with power scalability to kW level, narrow linewidth of less than 0.1nm and lasing wavelength automatically locked to the Rubidium (Rb) absorption line for ongoing and future DOE programs that need polarizing 3He. The laser system not only can provide the scalable output power but also has the excellent output beam profile. Raytum Photonics' innovative approach to developing hardware that meets the objectives of this opportunity is based upon our unique modular design of high power laser system combined with thermal wavelength tuning of volume Bragg grating (VBG) locked diode laser. This approach offers the following key benefits: High power output with power scalable by increasing the module number or/and the power of individual module. Lasing wavelength automatically locked to the Rb absorption line whilst the linewidth is less than 0.2nm. The modular design provides the solution for hybrid pumping the mixed vapor of Potassium (K) and Rb which shows advantage in polarization of 3He Hermetic sealing of individual diode modular will significantly improves the life-time of diode bar. Easy maintenance and cost flexible for the customers. Over the course of the Phase II effort, Raytum Photonics successfully demonstrated the feasibility of our proposed design approach to developing a high power narrow linewdith fiber coupled diode laser that satisfies the program requirements in a Phase II program. The accomplishments include: Developed Integrated, turn-key, fiber-coupled diode laser with power of more than 200 W with lasing linewidth close to 0.15nm. Lasing wavelength is automatically locked to desired wavelength. (794.7 nm or any other value been set within +/-0.2 nm) The laser has extraordinary stable output with stability of 0.7% over 48hours. Homogenous output beam profile. Modularized system design to lower the cost and make maintenance.
- Research Organization:
- Raytum Photonics
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- DOE Contract Number:
- sc0017155
- OSTI ID:
- 1756162
- Type / Phase:
- SBIR (Phase II)
- Report Number(s):
- DOE-RAYTUM-17155
- Country of Publication:
- United States
- Language:
- English
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