Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device
In order to improve the precision and beam quality of a pump laser for a spin exchange relaxation free inertial measurement device, we applied one scheme to achieve the square wave modulation and power stability control of the pump laser and another one to obtain the uniform intensity distribution o...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-04-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/21/9/2982 |
| _version_ | 1797536552410152960 |
|---|---|
| author | Jian Hao Hong-Liang Ke Zhai-Yue Yang Bang-Cheng Han |
| author_facet | Jian Hao Hong-Liang Ke Zhai-Yue Yang Bang-Cheng Han |
| author_sort | Jian Hao |
| collection | DOAJ |
| description | In order to improve the precision and beam quality of a pump laser for a spin exchange relaxation free inertial measurement device, we applied one scheme to achieve the square wave modulation and power stability control of the pump laser and another one to obtain the uniform intensity distribution of the laser beam, in which the acousto-optic modulator (AOM) and proportion integration differentiation (PID) controller were used to achieve the former, and the freeform surface lens was designed and optimized to achieve the latter based on the TracePro software. In experiments, the first-order diffraction light beam coming through the AOM had a spot size of about 1.1 × 0.7 mm<sup>2</sup>, and a spherical vapor cell with a radius of 7 mm was placed behind the freeform surface lens. Results show that the uniformity of the reshaped intensity distribution is higher than 90% within the target area with a radius of 7 mm both in the simulation and the experiment, which ensure that the uniform laser beam covers the area of cell. On the other hand, the power stability of the pump laser is controlled to be less than 0.05%. Compared with traditional methods, the complicated calculation process in optical design is better solved, and a higher uniformity with slight energy loss is achieved. |
| first_indexed | 2024-03-10T12:01:23Z |
| format | Article |
| id | doaj.art-f1b9e366f48a4e4ead30b6a2e4e3dba7 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T12:01:23Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f1b9e366f48a4e4ead30b6a2e4e3dba72023-11-21T16:56:04ZengMDPI AGSensors1424-82202021-04-01219298210.3390/s21092982Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement DeviceJian Hao0Hong-Liang Ke1Zhai-Yue Yang2Bang-Cheng Han3Zhejiang Lab, Research Center for Quantum Sensing, Hangzhou 311100, ChinaHangzhou Innovation Institute, Beihang University, Hangzhou 310000, ChinaZhejiang Lab, Research Center for Quantum Sensing, Hangzhou 311100, ChinaZhejiang Lab, Research Center for Quantum Sensing, Hangzhou 311100, ChinaIn order to improve the precision and beam quality of a pump laser for a spin exchange relaxation free inertial measurement device, we applied one scheme to achieve the square wave modulation and power stability control of the pump laser and another one to obtain the uniform intensity distribution of the laser beam, in which the acousto-optic modulator (AOM) and proportion integration differentiation (PID) controller were used to achieve the former, and the freeform surface lens was designed and optimized to achieve the latter based on the TracePro software. In experiments, the first-order diffraction light beam coming through the AOM had a spot size of about 1.1 × 0.7 mm<sup>2</sup>, and a spherical vapor cell with a radius of 7 mm was placed behind the freeform surface lens. Results show that the uniformity of the reshaped intensity distribution is higher than 90% within the target area with a radius of 7 mm both in the simulation and the experiment, which ensure that the uniform laser beam covers the area of cell. On the other hand, the power stability of the pump laser is controlled to be less than 0.05%. Compared with traditional methods, the complicated calculation process in optical design is better solved, and a higher uniformity with slight energy loss is achieved.https://www.mdpi.com/1424-8220/21/9/2982square wave modulationstability control of powerbeam shaping designfreeform surface lens |
| spellingShingle | Jian Hao Hong-Liang Ke Zhai-Yue Yang Bang-Cheng Han Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device Sensors square wave modulation stability control of power beam shaping design freeform surface lens |
| title | Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device |
| title_full | Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device |
| title_fullStr | Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device |
| title_full_unstemmed | Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device |
| title_short | Optimized Design of a Pump Laser System for a Spin Exchange Relaxation Free Inertial Measurement Device |
| title_sort | optimized design of a pump laser system for a spin exchange relaxation free inertial measurement device |
| topic | square wave modulation stability control of power beam shaping design freeform surface lens |
| url | https://www.mdpi.com/1424-8220/21/9/2982 |
| work_keys_str_mv | AT jianhao optimizeddesignofapumplasersystemforaspinexchangerelaxationfreeinertialmeasurementdevice AT hongliangke optimizeddesignofapumplasersystemforaspinexchangerelaxationfreeinertialmeasurementdevice AT zhaiyueyang optimizeddesignofapumplasersystemforaspinexchangerelaxationfreeinertialmeasurementdevice AT bangchenghan optimizeddesignofapumplasersystemforaspinexchangerelaxationfreeinertialmeasurementdevice |