Research on Generation of Laser Signal Using Semiconductor Optical Amplifier

Xiaoyuan Liu; Wanrong Gao; Shanxiang Mu

doi:10.3788/LOP202259.0714002

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 7 >Page 0714002 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 7, 0714002 (2022)

Research on Generation of Laser Signal Using Semiconductor Optical Amplifier

Xiaoyuan Liu, Wanrong Gao^*, and Shanxiang Mu

Author Affiliations

School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing , Jiangsu 210094, China

show less

DOI: 10.3788/LOP202259.0714002 Cite this Article Set citation alerts

Xiaoyuan Liu, Wanrong Gao, Shanxiang Mu. Research on Generation of Laser Signal Using Semiconductor Optical Amplifier[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0714002 Copy Citation Text

show less

Abstract

A system is reported in which a semiconductor optical amplifier is used to generate laser signal. The system mainly uses a terahertz laser which can generate two different frequencies and whose frequencies can be adjusted. The optical signal generated by the laser is converted into a stable electrical signal by a photodiode. As a low-noise radio frequency source, electrical signal can generate ultra-short pulse signal with low jitter and high repetition rate. Then, theoretical analysis and simulation experiment are carried out for each part of the system. According to Gaussian pulse theory, the parameters of pulse function in steady state are obtained. Finally, the single pulse and continuous pulse with different modulation frequency are simulated. The change of pulse is analyzed by changing the value of each parameter. The simulation results show that high repetition rate continuous ultrashort optical pulses can be obtained in the range of 10-30 GHz.

Keywords

active mode-locking laser optics semiconductor optical amplifier terahertz

\begin{array}{l} A (T, t) = {(\frac{E}{\sqrt[]{π} τ})}^{1 / 2} {[e x p - {(\frac{t - ξ}{\sqrt[]{2} τ})}^{2}]}^{1 + i q} \\ e x p [i Ω (t - ξ)] \end{array}

，（1）

T_{R} \frac{\partial A}{\partial T} + \frac{i}{2} (β_{2 Σ} + \frac{i}{Ω_{f}^{2}}) \frac{\partial^{2} A}{\partial t^{2}} - \frac{1}{6} β_{3 Σ} \frac{\partial^{3} A}{\partial t^{3}} = i γ_{Σ} {|A|}^{2} A + \frac{1}{2} (g_{Σ} - α_{Σ}) A - Δ_{A M} A c o s [ω_{m} (t - t_{m})]

，（2）

g_{Σ} = g_{0 Σ} {(1 + \frac{P_{a v e}}{P_{s a t}})}^{- 1} = g_{0 Σ} {(1 + \frac{E}{E_{s a t}})}^{- 1}

，（3）

Ω_{f}^{- 2} = {(Δ_{ω} / 2 g_{Σ}^{1 / 2})}^{- 2} + Δ^{- 2}

。（4）

g_{Σ} - α_{Σ} - \frac{1 + q^{2}}{2 τ^{2} Ω_{f}^{2}} - 2 Δ_{A M} e x p [- \frac{{(ω_{m} τ)}^{2}}{4}] = 0

，（5）

[\frac{β_{2 Σ}}{τ^{2}} - \frac{q}{τ^{2} Ω_{f}^{2}}] (1 + q^{2}) + \frac{E γ_{Σ}}{\sqrt[]{2 π} τ} + q Δ_{A M} ω_{m}^{2} τ^{2} e x p [- \frac{{(ω_{m} τ)}^{2}}{4}] = 0

，（6）

q \frac{β_{2 Σ}}{τ} + \frac{1 - q^{2}}{2 τ Ω_{f}^{2}} + \frac{1}{2} Δ_{A M} ω_{m}^{2} τ^{3} e x p [- \frac{{(ω_{m} τ)}^{2}}{4}] = 0

。（7）

Δ_{A M} ω_{m}^{2} Ω_{f}^{2} e x p [- \frac{{(ω_{m} τ)}^{2}}{4}] τ^{4} = 2 (1 + \frac{1}{β_{_{2 Σ}}^{2} Ω_{f}^{4}}) \times [\sqrt[]{1 + β_{_{2 Σ}}^{2} Ω_{f}^{4} (1 + \frac{E γ_{Σ} τ}{\sqrt[]{2 π} β_{2 Σ}})} - 1] - \frac{E γ_{Σ} τ}{\sqrt[]{2 π} β_{2 Σ}}

，（8）

q = \frac{1}{β_{2 Σ} Ω_{f}^{2}} [\sqrt[]{1 + β_{_{2 Σ}}^{2} Ω_{f}^{4} (1 + \frac{E γ_{Σ} τ}{\sqrt[]{2 π} β_{2 Σ}})} - 1]

。（9）

E = E_{s a t} (\frac{g_{0 Σ}}{α_{Σ}} - 1)

。（10）

Xiaoyuan Liu, Wanrong Gao, Shanxiang Mu. Research on Generation of Laser Signal Using Semiconductor Optical Amplifier[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0714002

Download Citation

Set citation alerts for the article

Tools

Set citation alerts for the article

Save the article for my favorites

Paper Information