Wavelength tunable laser system and its control method
A technology for tuning lasers and control methods, applied in the field of lasers, can solve the problems of unavailable lasers and difficult to achieve real-time feedback control, etc., and achieve the effect of simple structure, small size and high control precision
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Embodiment 1
[0039] Such as figure 1 As shown, in this example, 20 DFB laser modules 1 are arranged in parallel on the same plane and in the same thermoelectric cooler (TEC), that is, A thermoelectric cooler 2 in the figure, and the laser beams generated by each DFB laser module 1 pass through the condenser lens 3 converging on the optical waveguide 4. This example is a one-dimensional DFB laser. A. The temperature range of the thermoelectric cooler 2 is 10-60°C. The wavelength adjustment range of the DFB laser in this example is 1525-1610 nm, with a total of 20 channels, and the wavelength interval of each channel is 4.5 nm.
[0040] figure 2 Shown is the structure of the wavelength tunable laser system in this example, including microprocessor, DFB laser, A thermoelectric cooler and A temperature sensor installed on it, M spectrometer, N spectrometer, direction monitoring photodiode array (direction monitoring PD array), B thermoelectric cooler and Etalon and B temperature sensors in...
Embodiment 2
[0055] The DFB laser used in this example is also a one-dimensional DFB laser, such as Figure 5 As shown, 10 DFB laser modules 1 are fan-shaped and arranged on the same plane on the same A thermoelectric cooler 2, and the extension lines of the center lines of each DFB laser module 1 intersect at one point, that is, the laser light generated by them directly converges on the optical waveguide 4 .
[0056] Other structures are the same as in Embodiment 1.
[0057] Its method of use is the same as in Example 1.
[0058] The output laser beam produced by the wavelength tunable laser system and its control method in this example has a wavelength range of 1525-1568nm, covering the entire communication wavelength of the C-band, and the tuning accuracy is up to 1pm.
Embodiment 3
[0060] The DFB laser used in this example is as Figure 6 As shown, 10 DFB laser modules 1 are parallel and side by side on the same plane, and the laser beams generated by each DFB laser module 1 are converged on the optical waveguide 4 through the condenser lens 3 to form a DFB laser module array. Two identical DFB laser module arrays are each placed in one A thermoelectric cooler 2, the two A thermoelectric coolers 2 are parallel and side by side, and the two optical waveguides are combined into one to form a grouped two-dimensional DFB laser.
[0061] The structure of the wavelength tunable laser system in this example is as follows Figure 7 As shown, its optical path and circuit are similar to Embodiment 1. The two DFB laser module arrays are respectively located on the two A thermoelectric coolers, and each of the two A thermoelectric coolers is equipped with an A temperature sensor. The first output terminal of the microprocessor is respectively connected to control ...
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