What is femtosecond fiber laser?
What is femtosecond fiber laser?
A femtosecond laser is a laser which emits optical pulses with a duration well below 1 ps (→ ultrashort pulses), i.e., in the domain of femtoseconds (1 fs = 10−15 s). It thus also belongs to the category of ultrafast lasers or ultrashort pulse lasers (which also include picosecond lasers).
What are femtosecond lasers used for?
You may already be familiar with the femtosecond laser — it’s been used since 2001 in LASIK surgery to correct nearsightedness, farsightedness, and astigmatism. The same laser technology can provide more refined and predictable results during cataract-removal surgery.
Who invented the femtosecond laser?
Dr. Kurtz
Femtosecond laser technology was first developed by Dr. Kurtz at the University of Michigan in the early 1990s [1] and was rapidly adopted in the surgical field of ophthalmology.
What type of laser is femtosecond laser?
infrared laser
Femtosecond (FS) laser is an infrared laser with a wavelength of 1053nm. FS laser like Nd: YAG laser works by producing photodisruption or photoionization of the optically transparent tissue such as the cornea.
What is nanosecond laser?
Nanosecond lasers, sometimes referred to as nanolasers, are the most common category of q-switched pulsed lasers used today. The high peak power and short pulse widths of these lasers are ideal for a wide range of applications including LIBS, laser designation, and marking.
What invented Ahmed Zewail?
femtochemistry
Ahmed Zewail (1946-2016) was an Egyptian chemist. He invented femtochemistry and won the Nobel Prize in Chemistry for 1999. Chemical reactions were once thought impossible to measure, because they happen in only a few femtoseconds.
What did Ahmed Zewail discover his prize?
Zewail, in full Ahmed Hassan Zewail, (born February 26, 1946, Damanhur, Egypt—died August 2, 2016, Pasadena, California, U.S.), Egyptian-born chemist who won the Nobel Prize for Chemistry in 1999 for developing a rapid laser technique that enabled scientists to study the action of atoms during chemical reactions.
What is femtosecond?
The femtosecond laser is a high-energy optics technology used for eye surgeries and other medical procedures, including all-laser LASIK. During this bladeless procedure, your surgeon uses the femtosecond laser to create a flap in your cornea before altering the shape of the underlying tissue to correct your vision.
How much time is a nanosecond?
A nanosecond (ns or nsec) is one billionth (10-9) of a second and is a common measurement of read or write access time to random access memory (RAM). Admiral Grace Hopper famously handed out foot-long lengths of wire to students to illustrate how far an electrical signal can travel in a nanosecond.
How does a pulsed laser work?
Pulsed lasers are lasers which emit light not in a continuous mode, but rather in the form of optical pulses (light flashes). Depending on the pulse duration, pulse energy, pulse repetition rate and wavelength required, very different methods for pulse generation and very different types of pulsed lasers are used.
Why is femto laser not covered by insurance?
I take this opportunity to explain that although the femtosecond laser provides additional safety and produces better outcomes, the Centers for Medicare & Medicaid Services (CMS) categorize the femtosecond laser as a non-covered service because it corrects and manages astigmatism.