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Laser Spatial mode

Laser Spatial mode

The distribution of light intensity on cross section of laser beam is called laser transverse mode. The transverse mode is generally regarded as the laser mode. TEMmn is used to present transverse mode. TEM means transverse electromagnetic wave, both m and n are positive integers, respectively standing for ordinal numbers of the points with zero light intensity on x axis and y axis, called mode ordinal number. The diagram below shows light spots of several different laser beam transverse modes. TEM00 mode is also called as the basic mode, the light intensity of any point in its spot will not be zero. If there is a light intensity of any point in spot on x axis is zero, it is called as TEM10 mode; If a light intensity of any point in spot on y axis is zero, TEM01 mode, and so on, mode ordinal numbers m and n are larger, there are more points with zero light intensity in spots. Laser beam with different transverse modes is called as multimode.

 

 

Calculation method of laser divergence angle

Calculation method of laser divergence angle

Firstly, adjust the laser light to parallel light
to measure distant light spot and light spot at aperture

Divergence angle =2arctan ((spot diameter- beam diameter at aperture) / 2 / distance) * 1000All units are mm     

 

For convenience’s sake, you can use the following simple formula
(spot diameter (mm) – beam diameter at aperture (mm))/ distance (m)

 

Note: the above formula adopts the radian calculation result, the unit is mrad, if using the angle calculation result, please take ×π/180 as the unit
If it is 445nm laser, as all spots are rectangular and have big divergence in ⊥ direction, the beam diameter at aperture is the short side to measure spots at aperture while the beam diameter at aperture is the long side, the same for 635nm laser

 

Introduction to the characteristics of laser pointers of various wavelengths (colors)

Some laser lovers often ask me which one is better between two lasers of different wavelengths

Here I would like to introduce the characteristics of hand-held lasers of various wavelengths

according to the order from short wave to long wave


 

Personal Recommendation

For those who like showing off the light beam but don’t want to burn things, I recommend laser 400MW 532nm, it is very bright and you won’t feel 1000mW laser will be much brighter than this.

For those who like to burn things and show off the light beam once in a while, I recommend laser 1.6W 445nm, it is awesome to burn things up close.

For those who like to burn things from a distance, I recommend laser 500MW 405nm, this is absolutely good for lighting matches within 10 meters with ease.

 

 

 

 

 

CivilLaser DPSS Lasers 405nm 457nm 473nm 515nm 520nm 532nm 561nm 589nm 607nm 637nm 671nm

CivilLaser DPSS Lasers 405nm 457nm 473nm 515nm 520nm 532nm 561nm 589nm 607nm 637nm 671nm

405nm 100mW Laser


450nm 100mW Laser


457nm 500mW Laser


457nm 500mW Laser


473nm 100mW Laser


473nm 200mW Laser


515nm 20mW Laser


520nm 50mW Laser


520nm 1000mW Laser


520nm 1000mW Laser


532nm 10W Laser


532nm 10W Laser


532nm 10W Laser


532nm 1000mW Laser


561nm 100mW Laser


589nm 1000mW Laser


589nm 100mW Laser


589nm 1000mW Laser


607nm 100mW Laser


637nm 200mW Laser


637nm 1500mW Laser


671nm 200mW Laser


CivilLaser — Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

Motorized Angle Stages(Rotation and Tilt)

One-Axis Motorized Goniometer Stages

Two-Axis Motorized Gonimometer Stages

Two-Axis Motorized 360 Rotation Stages

Three Axis Motorized Goniometer and 360 Rotation Stage

Two-Axis Motorized Tilt Stages

Three-Axis Motorized Tilt and 360 Rotation Stage

Optical Mounts – Tables, Holders

Solid Plates

Protable Solid Plates

Optical Breadboards

Laser Tube Holders

Fiber Polarizers

Lens Holders

LIght Bafles

Heavy Duty Rod

Fine Ajustment Mounting Posts

Height Adjustable Moumting Posts

3-jaw Self-centering Chuck and Holder

Adjustable width Slits

Optical Mounts-Mirrow Mounts

2/3/4-Axis Linear Adjustment Mirror Mounts

Motorized Mirrow Mounts

Multi-Axis Compact Adjustment Stages

Optical Coupling modules

Laser Mounts

PrecisionPolarizer Mounts

Precision Polarizer Mounts

Multi-Axis Combination Stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

CivilLaser -- Motorized Angle Stages|Optical Mounts tables holders mirror mounts| Multi-Axis combination stages

Most powerful blue laser pointer 445nm 3000mw laser — 2×16340 or 2×18650

Most powerful blue laser pointer 445nm 3000mw laser — 2×16340 or 2×18650

1. Battery installation method.

Never install 3 batteries; it will burn out the laser as quick as a flash.

 

If you brought this blue laser pointer from our web store, please according to the following standards, strictly regulate the use of:
The International Electrotechnical Commission (IEC): the establishment and management of international laser safety standards, IEC 60825-2007
American: America National Standards Association (ANSI) laser safety committee Z136-2000 standard
China:
A) Radiation safety of laser products: GB7247.1-2001
B) Safety standards of laser protection device: GB18151-2000
C) Laser safety standards: GB18217-2000
D) Safety standards of laser operation field: GB10435-1989
According to the classification of laser products (GB 7247.1-2001) standard, this product belongs to the class IV: even by the laser diffuse reflection also is likely to cause harm, will burn the skin, ignite flammable materials, you should be particularly careful when the user operates this kind of laser source.
The wavelength of this product is the 445NM, visible light (400nm-700nm) laser, and the impact on the eye mainly for the photochemical and thermal effects induced retinal injury, The main effects on the skin mainly as dark , light-sensitive effect, skin burns .
Continuous density laser irradiation eyes will cause irreversible damage, please exercise caution when in close use, and please wear protective goggles for protection.
When not in use, should be placed in the minors cannot get place, and remove the batteries, turn off the switch, twist out safety pin for safekeeping, to prevent accidental injury events.
Our purchasers to determine before buying, we have notification obligation, the buyer must be observed, if the buyer does not listen to advice all the consequences of what happened, borne by the buyer, the shop is not responsible.
In addition, the restaurant lasers prohibit the sale to minors, please note!

 

 

Blue 3W laser pointer Precautions

The blue 3W upgrade project description:
1. After the upgrade, the attack of head is the 316 stainless steel material, high hardness, sufficient for self-defence and emergency hit hard materials like glass or material under normal circumstances.

2. The laser module heat radiating area increased one-third compared with the blue 2W, the better ability of continuous working.

3. Added safety latch and switch contacts, safety pin made from the plastic material to copper nickel-plated contacts plus higher conductive properties of 24K gold.

4. Added the ignition position line, to help with quick guide to had not been exposed to laser products buyers.

Have to take practical action to optimize the product, so that customers buy products with more practical value in use and continuous improvement, we will continue to move forward, and strive to bring you better products, never negative the laser lover’s love.

The blue 3W instructions:
1: using a laser lamp, without prolonged tube with two short battery, positive towards the tail cover, short battery and long battery cannot mix, also cannot be loaded at the same time 4 short batteries, battery single voltage is 3.7V, the flashlight for 7.4V driver.
Add the extension tube to put two long battery, positive towards the tail cover, cannot hold two small batteries a large battery.
Note: If fault wrong battery lead, is not in the scope of free warranty.

2: the laser diode is a high fever components, overheating could cause the laser diode accelerated aging, affect the service life of the laser pointer, so we suggest that when the heating is better in your hand, close it and cooling it.

3: multi gear products with exclusive four grade, dimming mode, divided into strong, weak and slow, flash mode, all the stalls are with slow start protection, light way: open the flashlight quickly after pressing the switch two times, into the next gear, laser flashlight with memory model, closed hand electric five seconds later, open default reply to open before the stall next time.

4: the use of LED lighting lamp holder, an 18650 battery driver, LED lamp is negative, so the battery negative pole with laser instead, with the correct method is positive in spring, negative towards the tail cover.
LED flashlight, with strong, weak, in the flash, SOS five stalls, continuous press two can enter the next gear.

5: Prohibited dismantle laser pointer, otherwise there may void the warranty.

6: the prohibition by the human body, especially the eyes, any accidents such as buyers do not follow the instructions as a result, the shop will not bear any responsibility.

Most Powerful burning Green Laser pointer Instructions – 1 x 18650 battery

Most Powerful burning Green Laser pointer Instructions – 1 x 18650 battery

 

1. Battery installation method.

The anode point to the lid.

1 x 18650 battery (Not Include)
2. The use of attention
Do not continuous light the laser over 120 seconds, we advice you turn off the laser every 60 seconds when the room temperature is too high. This is a high power handheld laser pointer, large heat productivity but do not have the heat radiating device, long time lighting is easily burnt out laser tube, will cause the laser point does not light or faint light.

3. Security warning
★ Do not look at the laser directly.
★ Do not use laser irradiation of others.
★ Do not use laser irradiation the objects which is easy to reflect light.
★ Do not let a minor child touch laser pointer.
Charge Description:
When charging the red light is on, after charging full the signal light is green.
Charging time reference:
1. 18650 battery: About 6 hours;
Lithium battery using common knowledge:
1. Do not over charging, over discharge, or whatever the lithium battery once will be scrapped (remember not to reduce the service life, was scrapped)
2. Do not run out the battery power, when you find that the lights dimmed you need to charge. (Do not charge too long time, just full is the best 😉
3. Beware of the battery is shorted, because the battery is not set short-circuit protection can result in excessive heat, or explosion
4. Do not throw batteries into fire, otherwise it will explode.
日本語 使用注意

連続使用時間は120秒を超えないでください。室外の温度は高い時に60秒毎に閉じたほうがいいです。
これはレーザーポインターの高効率のハンディタイプです。高効率なので発熱が大きい、それにハンディタイプは放熱装置が配置されていないので、長時間使用とレーザーパイプが燃しやすい、レーザーポインターが点滅しないや光が微弱の問題が起こります。
安全警告
★ レザーを直視ないでください。
★ 他人にレザー照射をしないでください。
★ 反射し易いものにレザー照射をしないでください。
★ 未成年の子供をレーザーポインターに接触させないでください。

Powerful blue laser pointer Manual – 2 x 16340 batteries

Powerful blue laser pointer Manual – 2 x 16340 batteries

1. Battery installation method.

The anode point to the lid.

 

2 x 16340 battery (Not Include)
2. The use of attention
Do not continuous light the laser over 120 seconds, we advice you turn off the laser every 60 seconds when the room temperature is too high. This is a high power handheld laser pointer, large heat productivity but do not have the heat radiating device, long time lighting is easily burnt out laser tube, will cause the laser point does not light or faint light.

3. Security warning
★ Do not look at the laser directly.
★ Do not use laser irradiation of others.
★ Do not use laser irradiation the objects which is easy to reflect light.
★ Do not let a minor child touch laser pointer.

Charge Description:
When charging the red light is on, after charging full the signal light is green.
Charging time reference:
16340 battery: About 4 hours;
Lithium battery using common knowledge:
1. Do not over charging, over discharge, or whatever the lithium battery once will be scrapped (remember not to reduce the service life, was scrapped)
2. Do not run out the battery power, when you find that the lights dimmed you need to charge. (Do not charge too long time, just full is the best )
3. Beware of the battery is shorted, because the battery is not set short-circuit protection can result in excessive heat, or explosion
4. Do not throw batteries into fire, otherwise it will explode.

 

 

日本語 使用注意
連続使用時間は120秒を超えないでください。室外の温度は高い時に60秒毎に閉じたほうがいいです。
これはレーザーポインターの高効率のハンディタイプです。高効率なので発熱が大きい、それにハンディタイプは放熱装置が配置されていないので、長時間使用とレーザーパイプが燃しやすい、レーザーポインターが点滅しないや光が微弱の問題が起こります。
安全警告
★ レザーを直視ないでください。
★ 他人にレザー照射をしないでください。
★ 反射し易いものにレザー照射をしないでください。
★ 未成年の子供をレーザーポインターに接触させないでください。

 

 

Instructions Small Laser Module With TTL — CivilLaser

Small Laser Module With TTL — CivilLaser

 

 

TTL laser module Operating Instructions

——————————————————————————————————————-

Jun 23,2015 Update

 

TTL laser modules inlcude three lines.
1. Red Line: Red line connect the positive;
2. Black Line: Black line connect the negative;
3. Yellow Line: Yellow line connect the positive signal line, Negative signal line connect the black line;

 

 

Continuous work-mode (1mw~10mw Laser module)
1. Red line connect the positive power supply;
2. Black line connect the negative power supply;
3. Yellow line vacancy;

 
Continuous work-mode (10mw~100mw Laser module)
1. Red line and Yellow line connect the positive power supply;
2. Black line connect the negative power supply;

 
TTL modulation(1kHZ~1000kHZ / 2V-5V)
1. Red line connect the positive power supply;
2. Black line connect the negative power supply;
3. Yellow line connect the positive signal line;
4. Black line connect the negative signal line;
(Note: In Modulation mode, the black line be connected the negative power supply and the negative signal line;)

 

 

——————————————————————————————————————-

Modulation module instructions
1. When in use, connect the red and yellow line, the module will be bright, and in continuous work mode;
2. When you want modulation, connect the negative of signal line to black line, and positive to yellow line, keep the red line suspended, then the module in modulation mode;
3. Signal input should be in the range of 300KHZ;
4. The input voltage of modulation work is 3.3V, continuous work input voltage is 3.3V.

 

 

Laser knowledge summary (Updating…)

Summary of Common Laser Knowledge (to be continuously updated)

 

 
☆Laser module — The relationship between the power,brightness and working disance
http://www.blog.civillaser.com/?p=70

 
☆Introduction to the characteristics of laser pointers of various wavelengths (colors)
http://www.blog.civillaser.com/?p=146

 
☆Which color laser beam brightest?
http://www.blog.civillaser.com/?p=33

 
☆Different laser wavelengths which band burning something stronger?
http://www.blog.civillaser.com/?p=37

 
☆Focus adjustable burning laser poitnre
http://www.blog.civillaser.com/?p=161

 

☆Laser beam class level & Laser Safety Classification
http://www.blog.civillaser.com/?p=58

 
☆Various wavelengths of the laser beam/ Laser Knowledge — CivilLaser
http://www.blog.civillaser.com/?p=77

 
☆Comparison of brightness of light spot and beam among lasers of different wavelengths
http://www.blog.civillaser.com/?p=159

 
☆Instructions Small Laser Module With TTL — CivilLaser
http://www.blog.civillaser.com/?p=120

 
☆Most powerful blue laser pointer 445nm 3000mw laser — 2×16340 or 2×18650
http://www.blog.civillaser.com/?p=131

 
☆ Most Powerful burning Green Laser pointer Instructions – 1 x 18650 battery
http://www.blog.civillaser.com/?p=128

 
☆ Powerful blue laser pointer Manual – 2 x 16340 batteries
http://www.blog.civillaser.com/?p=124

 
☆Different wavelength has different light emitting principle.
http://www.blog.civillaser.com/?p=35

 
☆Different laser wavelengths, What are the shape of the laser spot?
http://www.blog.civillaser.com/?p=39

 
☆CivilLaser DPSS Lasers 405nm 457nm 473nm 515nm 520nm 532nm 561nm 589nm 607nm 637nm 671nm
http://www.blog.civillaser.com/?p=141

 
☆Calculation method of laser divergence angle
http://www.blog.civillaser.com/?p=151

 
☆Laser Spatial mode
http://www.blog.civillaser.com/?p=155

 
☆Bonding crystal, optical cement crystal, separated crystal
http://www.blog.civillaser.com/?p=157