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Semiconductor Laser
Semiconductor Laser (Product Code: SLE/PHY/291) is a red diode laser used for optics, speed of light and optical communication experiments in school and college physics laboratories. It emits an intense monochromatic beam at 630 - 640 nm and 0.9 mW (Class II operation), which can be modulated from an external waveform or by its own internal pulse generator. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, as a laser experiment kit component for institutions.
Specifications
| Parameter | Detail |
|---|---|
| Beam | Intense, monochromatic red beam |
| Wavelength | 630 - 640 nm |
| Output power | 0.9 mW (Class II operation) |
| Beam divergence | Typically about 1 milliradian |
| External modulation | Digital or analogue waveform applied to the 3.5mm jack socket on the rear panel |
| Internal modulation | Internal generator producing 0.1 µs pulses at approximately 1 MHz |
| Main application | Speed of light experiments; general optics work |
| Product code | SLE/PHY/291 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the Semiconductor Laser Used For?
The feature that sets this laser apart is modulation. Switched to its internal generator, it sends short 0.1 µs light pulses at about 1 MHz; students place a fast photodetector near the laser and another at the far end of a measured path, display both signals on a dual-trace oscilloscope, and read the delay to calculate the speed of light. Feeding an audio or digital signal into the 3.5mm rear jack instead turns the beam into a simple optical communication link.
Unmodulated, the narrow, low-divergence red beam is ideal for single-slit, double-slit and diffraction grating work, for tracing reflection and refraction through blocks and prisms, and for aligning optical benches. At Class II output the natural blink reflex normally protects the eye, but students should still never look into the beam, point it at people or let it bounce off shiny surfaces towards the class.
What to Specify When Ordering
- Number of Semiconductor Laser units required.
- Whether you plan speed of light work and need an oscilloscope and detectors quoted as well.
- Your modulation source for external signals, such as a signal generator.
- Mains supply voltage at the point of use, so we can confirm the right power arrangement.
Supplier
ScienceLab, the trading name of Jain Scientific Equipments Private Limited in Ambala, Haryana, India, supplies this semiconductor laser to schools, colleges, universities and dealers. We can build a complete optics or speed of light bench around it, with the oscilloscope, optical bench and mirrors listed on our site, and send one consolidated quotation. Read about the company on our profile page.
Related Physics Lab Equipment
Items commonly used with the Semiconductor Laser:
- Oscilloscope Dual Trace — displays sent and received pulses for the speed of light delay.
- Signal Generator and Amplifier — external waveform source for the modulation jack.
- Optical Bench Set — holds slits, lenses and screens in line with the beam.
- Mirror, Plane Glass — folds the beam to lengthen the path in a small room.
- Laser Pen, Red — simple pointer-type laser for basic ray work.
See the wider optics range in Physics Lab Equipment.
Frequently Asked Questions
What wavelength and power does the Semiconductor Laser have?
The Semiconductor Laser emits an intense monochromatic red beam of wavelength 630 - 640 nm at 0.9 mW, corresponding to Class II operation. Its typical beam divergence is about 1 milliradian, giving a narrow spot over long bench distances.
How is the Semiconductor Laser modulated?
The Semiconductor Laser can be modulated by an external digital or analogue waveform applied to the 3.5mm jack on its rear panel. Alternatively, its internal generator produces 0.1 µs pulses at approximately 1 MHz, which suits speed of light measurements.
Can the Semiconductor Laser measure the speed of light?
Yes, the Semiconductor Laser is designed to make speed of light experiments straightforward. Its short internal pulses travel a measured path to a detector, and the delay seen on a dual-trace oscilloscope gives the speed. The detector and oscilloscope are quoted separately.
Is the Semiconductor Laser safe for classroom use?
The Semiconductor Laser operates at Class II, a low power level normally protected by the eye’s blink reflex. Teachers should still prevent anyone from staring into the beam, avoid shiny reflecting surfaces in the beam path and supervise students throughout the practical.
What mains supply does the Semiconductor Laser need?
The supply voltage for the Semiconductor Laser is not listed here, so please tell us the mains voltage used in your laboratory through the contact page. We will confirm the correct power arrangement before quoting.
Who supplies the Semiconductor Laser?
The Semiconductor Laser is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), based in Ambala, Haryana, India. We supply schools, colleges, universities and dealers in India and international markets, often as part of a complete optics bench.
Request a Quote
Get a quotation for the Semiconductor Laser by writing to us through the contact page, or add it and any matching items to the enquiry cart and submit a single enquiry.
Last updated: 24 September 2026
