In this issue of "Popular Science·The Serious School", we have deeply explored an important concept in laser technology - fiber laser. Next, let us go into the question-and-answer class together to review those key knowledge points and test your professional knowledge.

Question and Answer Classroom

1: What is the working principle of fiber laser? Single Choice

A) Emitting laser through electron collision in laser medium
B) Absorbing pump light and re-emitting laser through rare earth ions
C) Focusing laser using the refraction principle of optical fiber
D) Laser is emitted through reflection by a reflector

2: Which characteristic of fiber laser makes it particularly important in medical beauty? Single Choice

A) High efficiency
B) High beam quality
C) Compact structure
D) Excellent thermal management

3: What advantages does the high efficiency of fiber laser bring? Single Choice

A) Enhance the durability of fiber laser
B) Improve the energy conversion rate of fiber laser and reduce energy loss

C) Make the device smaller in size and easier to carry
D) Improve the thermal stability of the equipment

4: What are the advantages of the compact structure of fiber lasers? Single Choice

A) Save space and facilitate equipment integration
B) Enhance beam quality
C) Increase treatment speed
D) Increase treatment range

5: What is the application of fiber laser in tattoo removal? Single choice

A) Removal by reducing the size of pigment particles
B) Destroy tattoo pigment particles through selective photothermal effect
C) Promote skin regeneration through laser thermal effect
D) Control treatment depth through pulse modulation