1.1 Technical Principal of Wind-detecting Radar
The mainstream radars on the market all use Doppler coherent detection technology. That is, the laser beam is emitted into the air by the laser radar, and the moving aerosol particles will cause a Doppler frequency shift phenomenon in the reflected wave, and then the reflected wave is processed by the laser radar, the wind speed and wind direction information contained in it can be analyzed. Laser coherent Doppler wind measurement technology is the best technical approach for fine wind field measurement at present. At present, Doppler wind-detecting radar using the coherent detection principle is divided into continuous wave coherent detection and pulse coherent detection according to the detection mode.
1.2 Wind-detecting Radar Scale
In order to achieve the carbon peaking and carbon neutrality goals, the wind power industry has been rapidly rising and developing, and the healthy development of the wind power industry is inseparable from the detection of wind data.
In 2021, the global laser wind radar market sales will reach 208 million US dollars, and it is expected to reach 514 million US dollars in 2028, with a compound annual growth rate (CAGR) of 12.77% (2022-2028).
Global Wind-detecting Radar Market Sales Amount and Growth Rate: (2017-2028)
1.3 Wind-detecting Radar Technological Difficulty (Laser)
In order to obtain good and stable interference between intrinsic light and signal light, it is first required that the laser must have excellent coherence. Coherent detection uses the principle of optical heterodyne detection to mix two laser signals in the optical frequency band to achieve optical coherent detection. This technology requires the local oscillator lasers and beam combiners, and has higher requirements for lasers and detectors.
At present, lasers are mainly single-frequency narrow-linewidth lasers, and the most important requirement for lasers is frequency stabilization.
1.4 Optizone Wind-detecting Radar Solution
1.4.1 Optizone Solutions to Wind-detecting Radar Technological Difficulty
Optizone 1550nm polarization maintaining components are suitable for wind-detecting radar fiber lasers, including polarization maintaining pump combiners, wavelength division multiplexers, couplers, isolators, circulators, etc. The product has excellent stability. Each product has passed the GR-1221-CORE standard test, and the test results are far better than the standard requirements.
For example, the industry standard for the insertion loss test of polarization maintaining wavelength division multiplexers is ≤0.5 dB. The change of insertion loss value before and after 2000h damp heat test is less than 0.07dB. The change of insertion loss value before and after drying test is<0.06dB. Low temperature test insertion loss variation <0.03dB. 500 cycle tests insertion loss variation<0.03dB.
1.4.2 Product List
Polarization Maintaining Wavelength Division Multiplexer
1.Pump / Signal Multiplexing
2.Low Insertion Loss (0.5dB)
5.High Power Handling Capability (CW: 5W, Peak Power: 10kW)
Polarization Maintaining Pump Combiner
1.Low Insertion Loss (0.8dB)
2.High Isolation (25dB)
3.Transmission Efficiency (90%)
Polarization Maintaining Tap Coupler
1.Low Insertion Loss (0.7dB)
2.High Return Loss (50dB)
3.High Power Handling Capability (CW:3W;Peak Power:10kW)
Polarization Maintaining Tap Isolator
1.High Isolation (50dB)
2.Low Insertion Loss (0.7dB)
3.High Power Handling Capability (CW: 5W, Peak Power: 10kW)
Polarization Maintaining Bandpass Isolator
1.High Extinction Ratio (23dB)
2.Low Insertion Loss (0.8dB)
3.High Power Handling (CW: 1W, Peak Power: 1kW)
4.High Isolation (35dB)
Polarization Maintaining Circulator
1.Low Insertion Loss (0.6dB)
2.High Return Loss (50dB)