Ask a Doctor app on Android
Get your Health question answered in 3 easy steps
Ask a Doctor Now
178 Doctors are Online

topicLogo Laser

A laser is a device that emits light ( electromagnetic radiation ) through a process of optical amplification based on the stimulated emission of photons . The term laser originated as an acronym for Light Amplification by Stimulated Emission of Radiation . The emitted laser light is notable for its high degree of spatial and temporal coherence , unattainable using other technologies. Spatial coherence typically is expressed through the output being a narrow beam which is diffraction-limited , often a so-called pencil beam. Laser beams can be focused to very tiny spots, achieving a very high irradiance . Or they can be launched into a beam of very low divergence in order to concentrate their power at a large distance. Temporal (or longitudinal) coherence implies a polarized wave at a single frequency whose phase is correlated over a relatively large distance (the coherence length ) along the beam. A beam produced by a thermal or other incoherent light source has an instantaneous amplitude and phase which vary randomly with respect to time and position, and thus a very short coherence length. Most so-called single wavelength lasers actually produce radiation in several modes having slightly different frequencies (wavelengths), often not in a single polarization. And although temporal coherence implies monochromaticity, there are even lasers that emit a broad spectrum of light, or emit different wavelengths of light simultaneously. There are some lasers which are not single spatial mode and consequently their light beams diverge more than required by the diffraction limit. However all such devices are classified as lasers based on their method of producing that light: stimulated emission. Lasers are employed in applications where light of the required spatial or temporal coherence could not be produced using simpler technologies.
52 Premium Questions
117 Online Doctor Chat
259 Public Forum Questions

Premium Questions (52)

I need the best possible scar treatment.
Im 10 weeks pregnant. Is it safe to use hair removal creams in the genital areas?
I have some white spots on my cheeks, and they are NOT Vitiligo, it´s just lighter than the other part, which is the best option to recover the pigment? I visited doctors and they stated I have brown spots and they...
hi, this is a 34yrs old male, i have taken a full body XXXXXXX diode (soprano accord) laser hair removal package but the doctor is not ready to treat the scrotum area with the laser, but i am looking for a complete body hair free experience, hence...
Hi, I have Acne scars on my face.. My doctor has suggestedme to go for a combination of Dermaroller treatment + Subcision for a total of 10 sittings.. Has also suggested me the cure by Laser at a later stage. I am a little skeptical about going...
I am 29 years old. I used to have Hypothyrodism years ago but I was told 5 years ago its normal now I have gained weight even thought I don't eat much I even had lipo suction for my arms they are still huge thats really not normal
I have been taking laser treatment for removal of unwanted hair on my face i.e on the chin area.After the laser treatment I have developed rashes in the place where laser was done.Doctor suggested me to use momate...
I have two dark scars on my nose from injury caused by fall one month ago. Should I think about laser treatment to reduce them.
Hi Doctor, My wife is in overweight, I want her to go for liposuction. Can you suggest me, is it good or bad to go for liposuction?
I just signed up for lipo laser therapy (9 sessions) and read in the disclaimer you're not supposed to do it if you have herpes simplex. What are the side effects?
View more

Online Doctor Chat (117) - Laser

Doctor : hi Doctor : how can I help you? User : Herllo Doctor : plz continue User : Iam a patient of pemphigus vulgaris Doctor : ok User : i am taking steroids from last 4.5 yrs User : i am married User : i want to go for a child Doctor...
Answered by
User : hi Doctor : Hi User : hello,just wanted to ask you that do scar of pimple get removed by laser treatment Doctor : Yes. User : and how much sittings does it required User : i alredy had 2 sittings Doctor : It depends on the depth of...
Answered by
Doctor : Hi User : hi doc Doctor : How can I help you? User : m 26 yrs old Doctor : Ok User : and i have had stretch marks since early 2007 Doctor : ok User : and also got more in 2009 due to over weight XXXXXXXX short time Doctor :...
Answered by
User : hello sir, i need to remove the permanent tatoo from skin pls. let me know the proceedure Doctor : hi Doctor : when was the tattoo done? User : how to remove it from the skin User : 2 year back Doctor : which area of body is it...
Doctor : hi Doctor : how can i help you? Doctor : are you there? User : Hi sir my friend is in need to remove a tattoo on his shoulder which is very stongly sticked to his skin. Doctor : ok User :Dear Sir,I have come to know about your...
Answered by
View more

Public Forum (259) - Laser

Hi Am 16+ And i have Pearly Penile Papules For about a year and 26 Days and am so Worried I search on the internet To know how to Remove Them I read About the Co2 laser Treatment and i read that it is expensive and i did t want to do it cause i donot have No money for that kind ah treatment and i read on the internet that u can use toothpaste to...
1 Answer
hi..am shilpa(female)doing my masters..i want to go for laser treatment for upperlips n lowerchin.my hair grow is thick,is it safe to go for laser?will there be any side effects?am 25yr old.plzzz suggest me..
1 Answer
Hi I am wearing spects past 6 years and thinking for laser operation to get rid off spects for forever. Could you please let me know the cost and any side effects? Kind regards, Ashish Jain
2 Answers
i am suffering from pcod since 6 years.now my age is 23.married 3 months ago.my weight is 65kg and height 5.6....last month i visited my doctor . my doctor advised me to take deviry pills for three cycles to get concieve. is this really works .......i am so afraid whether i will concieve or not....i heard that people suffering from pcod have...
2 Answers
hi, I am wearing power glass. I am 20 years old. shall I go for laser operation if I do that any side effect is there ? plz answer me
1 Answer
hi, Docter i have many quires like i m a hypothyriod patient and i also have bilateral polycysts sydore in both ovarys my gync precibe me eltroxin for thyriod, riomet od 500mg folinext d,mcbm-69and ton concieve she precibe me siphene-100 and susten 400 from 22 day to 28 day of my LMP date now on 21 day of LMP i m feeling sore breast light...
1 Answer
I am srikanth and i am 23 years old. I want to get rid of my back hair through laser theraphy. can you advice me?
2 Answers
i am 35 aged unmarried female. now a days my period extends 4 days to 7 days period for the last 4 months. The blood discharge is firth 2 and half days only. nothing discharged on 4th day. 5,6,7th days light brownish discharged occur. 1. what is the reason? 2. Is it normal for 35 aged female. 3. Is it need medication or any natural way.
1 Answer
i want to ask how much cost i will taken in mumbai has circumsation surgery? ang suggest laser adult circumstation operation hospital?
1 Answer
hello,i m suffering from piles and fissher from past 2 yrs ...i also get operated once bt after 6-7 month it started paining again and also again a small portion of skin came out .now again i am facing the same problem.i want to ask that is there any way to get relief from it permanently or i have to get operated again??plz suggest me and also i...
View more
All the information, content and live chat provided on the site is intended to be for informational purposes only, and not a substitute for professional or medical advice. You should always speak with your doctor before you follow anything that you read on this website. Any health question asked on this site will be visible to the people who browse this site. Hence, the user assumes the responsibility not to divulge any personally identifiable information in the question. Use of this site is subject to our Terms & Conditions
What people are searching on Healthcaremagic
Online Doctor Online Medical Advice Child suffering from cold, cough, blocked nose and breathing difficulty. How to cure this? Pregnant. Suffering from diarrhea. Should I be worried? BP raised after accident. Getting irritation in palms and legs. Safe to take aldonil 150 mg OD? On avanza for depression and anxiety. Is it safe to start duromine? What treatment should be done for breast lump? Slipped and twisted leg. Heard a crack sound and getting pain. What should I do? Child has double outlet right ventricle in heart and cleft palate. Diet to gain weight Suffering from dizziness. What is the cause and cure? Have headache, neck sprain, pain in legs and arm . How to get relief? Pain in kidney and constipation. Any treatment? Back pain, nauseated, found large lymph node in neck and under arm. What could it be? How to get relief from back pain and leg pain? Prescribed nevamac eye drops, chymoral for bleeding eye and mild cataract. What is the disease? Have burning sensation at penis tip and urge to urinate constantly. Any advice? Suggest an antibiotic for acute mouth ulcer below the tongue 32 years old. Suggest some medication or diet to increase weight Kidney stone cured after treatment. Ultrasound showed stone in both kidney. Precaution to be taken? On thyroid medication. Experiencing heart palpitation and low BP. Any suggestion? Is it safe to give bacigyl-n to one year old child? Getting feeling of full stomach and severe gas. How to get rid of this? Advantage and disadvantages of using zevit zinc capsule Can i continue retina detachment treatment again ? Suffering from sinusities. How much it will cost for surgery in india I want to have a alopathy cure for low sperm motility problem VIRAL INFECTIONS AFTER LEAVING HOSPITAL Can low uterine lining be a cause miscarriage ? How are dark spots on the face treated ? How to get rid of holes caused by pimple? Will a nose become flat if it is pressed or twisted for a long time ? Does Hexavalent Chromium Cause Non-Hodgkins Lymphoma Burkitt's type 4 ? By which way can I make my ear lobe go backward ? How can I get rid of this pimple like on my head which is itching ? Why is there swelling on the face and neck after taking medicines for cough ? Does masturbation lead to knee soreness ? How to gain weight at the age of 30 ? g should i go if it does not clear up on own until i visit my dr ? I have lost a little weight... Would acupuncture help in treating samters triad ? I got orange crystals with wiping after urination. Is this kidney stones ? Long term effects of smoking K3 Use of clearz ultra gel