Product Overview
Hitachi HLP-1600 Semiconductor Laser Diode, Unused Old Stock, Still in Its Serial-Numbered Hitachi Case
Condition
New / unused, old stock. The piece photographed sits in its original clear plastic Hitachi case on a green foam cradle, and the printed factory label reads HITACHI LASER DIODE, Type HLP-1600, Serial No. 3F0354, Made in JAPAN. The diode itself is a metal can header with a bright nickel-colored body, a dark cap section, and straight, unbent leads. The plastic case shows light shelf haze and a small scuff or two on the lid, and the label has aged to a cream tone. Against the millimeter ruler the case measures approximately 65 mm across. Two pieces are in stock; each Hitachi case carries its own serial number, so the number on the piece you receive may differ from 3F0354.
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Product Overview
The Hitachi HLP-1600 is a packaged semiconductor laser diode supplied in a hermetic metal can header with four straight leads, the small optoelectronic package that laser diodes have shipped in for decades. This listing publishes it at 30 mW optical output over a 700-1350 nm range; those are the figures carried in our records, not measurements we took, so treat them as published specifications and check them against Hitachi documentation before you design around them. What is confirmed is what the camera shows: a Hitachi factory-labeled case, the HLP-1600 type designation, serial number 3F0354 on the photographed piece, and Made in JAPAN printed under it. A laser diode is a current-driven device, not a voltage-driven one, and it will not forgive a supply that overshoots, so a proper constant-current driver with a current limit and slow-start is part of the job on any part in this family.
Key Features
- Manufacturer: Hitachi, label printed Made in JAPAN
- Type designation: HLP-1600, printed on the factory case label
- Serial number on the photographed piece: 3F0354
- Optical output: 30 mW as published in this listing - not measured here
- Wavelength: 700-1350 nm as published in this listing - not confirmed, verify against the Hitachi datasheet before use
- Package: hermetic metal can header with straight, unbent leads
- Packaging: original clear plastic Hitachi case with foam cradle and printed serial label
- Condition: new / unused old stock, never installed
- Stock: two pieces, sold each
Applications
- Optics lab technician rebuilding a bench source and wanting a known-brand diode in its original factory package rather than an unmarked pull
- Service engineer keeping a legacy Hitachi-equipped optical instrument alive and matching the original HLP-1600 designation exactly
- Photonics student or hobbyist building a constant-current laser diode driver and needing a real packaged diode to develop against
- Collector of Japanese optoelectronics who wants the diode, the case, and the serial-numbered label intact as one piece
Frequently Asked Questions
Are the 30 mW and 700-1350 nm figures measured?
No. Those figures come from our listing records, and we have published no optical test data for this piece. Treat them as published specifications and confirm the emission wavelength and output rating against Hitachi documentation for the HLP-1600 before you commit it to a design.
Will the piece I receive have serial 3F0354?
Not necessarily. Each Hitachi case is individually serial numbered, and two pieces are in stock. The photographs show one representative unit and its label; the piece shipped to you will be a like unit in the same original packaging with its own serial number.
Does it come with the original case and foam?
Yes. The diode ships as photographed, seated in its clear plastic Hitachi case with the green foam cradle and the printed factory label. The case has light shelf haze and minor scuffing on the lid, which is what you see in the photos.
What do I need to drive it safely?
A regulated constant-current source with a hard current limit and slow-start, plus normal laser handling discipline: static protection on the leads, no eye exposure to the emitted beam, and appropriate eyewear for the operating wavelength. Pin assignment and maximum ratings are not confirmed here - verify them against the datasheet before applying current.
This is decades-old unused stock. What am I actually taking on?
You are getting exactly what the photographs show: an unused Hitachi HLP-1600 in its original serial-numbered case, never installed, and sold with no optical test results attached. The photos are the spec for the piece pictured, so read them closely - the label, the leads, the packaging condition. What we cannot tell you is how it performs on a current source, because we have not published that measurement, and a laser diode that has been on a shelf for a long time is bought on its packaging and provenance rather than on a bench report. If that risk is one you can carry, this item clears the free-shipping line on its own, and orders leave our Idaho warehouse the same or next business day.
Hitachi serialized these one at a time, and this one still wears its own number, 3F0354, on a label printed in Japan. Bring a careful driver and a real current limit, and the work it was built for is still ahead of it.
