The Investigation of the Balanced Output Power of Multi-Section Tunable Laser Based On Reconstruction-Equivalent Chirp Technique

High-power eight-wavelength distributed feedback laser array with 100 GHz spacing using grating reflector

“… – 3 To date, different MWLs have been realized by tunable distributed Bragg reflector laser arrays, 4 micro-disk laser arrays, 5 vertical cavity surface emitting laser arrays, 6 and distributed feedback (DFB) laser arrays 7 – 11 Among them, owing to the high mode stability, good SLM operation, and easy integration with other photonic components, the DFB laser array is considered an ideal scheme to realize MWLs. To obtain higher output power, high-reflection (HR) and anti-reflection (AR) coatings and high bias current are usually applied to the DFB laser, 12 which will introduce an unavoidable random grating phase at the HR facet, leading to a reduction in SLM yield and causing variations in the lasing wavelength.…”

Effect of wavelength accuracy of reconstruction-equivalent-chirp laser arrays on performance of wavelength division multiplexing space laser communication system

“…The advantage of the SBG structure based on the REC technique is that 50 GHz/100 GHz wavelength spacing can be achieved through photolithography, whereas the traditional DFB grating is commonly fabricated by EBL, which is time consuming and costly. 8 In addition, the fabrication of multi-wavelength array can be simplified, and the cost can be lowered. In particular, with increasing the number of laser arrays, this advantage is deeply reflected.…”

“…The REC technique is an equivalent phase shift technique in the sampled Bragg grating (SBG) structure, where an equivalent phase shift can be introduced to ensure expected performance. The advantage of the SBG structure based on the REC technique is that 50 GHz/100 GHz wavelength spacing can be achieved through photolithography, whereas the traditional DFB grating is commonly fabricated by EBL, which is time consuming and costly 8 . In addition, the fabrication of multi-wavelength array can be simplified, and the cost can be lowered.…”